Lots of writing ability in your natal chart. Sun in Cancer in the 10thwill make you do best by being the boss, or working solo, in a field where you can express emotions. Moon in Aquarius in the 5th gives an emotional need to express ideas in a creative way, emphasized again by Mercury in Cancer in the 10th. Romance or even erotica would be good, with Venus in Taurus, the planet for all that, in the 9th house, that's got a thing for creative expression. The Jupiter in Aquarius in the 5th can make you have luck writing about off-the-wall things, and write them with confidence. Saturn in Scorpio in the 2nd means you can make money off of anything complex, or mysterious to others. Same for Pluto in Cancer in the 10th, writing about sex, death, emotions, anything complex , as a career.
Aspects to your natal chart hammer these points home. Mercury sextiles Venus, giving artistic ability in writing. Uranus perfectly trines Mercury, meaning unusual, even innovative talent with words. Then, Venus turns around and perfectly trines Uranus, making you actually enjoy the unusual.
The Sun conjunct gives the ability to know and acknowledge you work best alone, or, better yet, with minimal supervision. That aspect will give you a problem of not doing anything unless you're convinced you're very good at it. But Jupiter trines the MC, giving you good luck and success in a creative-oriented career. Even if you don't want to write professionaly, Neptune opposite Moon means you need an outlet for your imagination, almost constantly.
Uranus loosley squares the MC, making you drawn to a career most people wouldn't even think up. Again, this square says you'd be better off working for yourself, or at least have a boss that would ignore you. Mars squares your MC as well, giving you energy with strife. True Node, in Cancer in the 10th, can push you into a creative career while satisfying you emotionally.
The progressed chart looked promising. Jupiter progressed into Aquarius into the 3rd house, good luck with writing. Mercury conjuncts the MC, meaning writing for a career again. Pluto sextiles the MC, so there may be a reborn, renewal-type transformation here.
I can see why you married young, lots of 5th, and 7th activity going on, along with Venus rising, since my own chart's similar. Mars in Aries in the 7th means you need change and variety in a relationship, but you have enough fixed signs to stabilize this. Uranus in Pisces in the 7th tend to give you an unconventional marriage, and a big dislike for stagnation. Highly independent even if married, this placement can make you idealize marriage, but also become creatively inspired due the relationship. It can make you highly sensitive to any transit, but it looks like the instability you've mentioned won't necessarily lead to a divorce. A synasty chart might could answer that, or drawing up your husband's chart even. If someone else can interpert it from yours, please step forward.
I looked up your coming short-term transits to answer the question, but it was no go. Might as well point out some of them anyway, so here goes:
Transiting Saturn trining Jupiter, effective from 4/30-5/18: working extra hard preparing for a career(near the MC soon), applying ideals into reality. Anything you do in these areas will have a positive effect on you overall.
Transiting Jupiter trining Mars, from 4/7-5/14: good aspect that makes you expand your vitality and energy, making things fall into place as a result. Unexpected help from friends, maybe a cease-fire with an enemy, leads to an increase in drive and determination.
Transiting Jupiter opposing Moon, 6/16-6/27: can make your feel pessimistic and unlucky. A tendency to gain weight, or just feel bad for no reason. Can also lead to internal arguments, what you want to do being what you think you shouldn't do.
Transiting Saturn conjunct Sun, from 7/15-8/2: and it's in the 10th house to boot, so it's an excellent time to work. This is a great aspect to start new projects, break old habits, make new business contacts, anything that'd give you income for a career. Only problem is, with the conjunction, you could overdo it.
Can't see the answer, but looks like you're on the right track....the orbs I use were very tight, so the above transits could last a little longer, or maybe not. Still, the marriage question is bothereing me...