Hi StLouisTarot,
I might be able to help (florist for years here) but I dont know where you are, and what you may have available, and in what season you're in, where you are. You may need to pick flowers and dry them if they are not available at the time, or get them ordered so they can be available fresh two days before the wedding. You will need to care for them when you get them, and consider things like not getting your dress hands and everything else wet or stained from some of the stamen pollens and stems. Some of the blooms and foliage maybe able to be dried to keep afterwards too.
Certain flowers mean certain things and you can make a bouquet to represent your celebration. Ribbons can be made from twines, trailers, and leaves, and can be bound by natural coloured threads.
and it is simple to put a bouquet together, but on the day, it might be a completely different thing. Most bouquets are made the night before, and stored somewhere cool and safe (not the fridge though!!!) so that its ready for the next day. Maybe you could consider asking someone else to make the bouquets for you - a special friend - or someone who you could nominate so it will mean something to them and to you. If thats their only job - they'll still have their hands full doing this (pardon the pun).
I dont know if you need to consider your maids and the rest of the wedding party too - or garlands of fresh flowers for tables and scatter flowers.
Pm me if you like - it might be easier!
But I'll help where I can if you need
Blessings
Elven x