as far as I know, your FAFSA should NOT affect his FAFSA - they are 2 completely different accounts that existed prior to your marriage.
Although, to be clear, I would suggest speaking to your student loan representative. Additionally, you may have payments due if you took loans - this can be worked out too - but you have to speak to someone at fafsa to determine where you stand and how it will affect your future as a student - here is their contact information
One other thing I do want to mention - your health benefits - I am guessing you are covered by medicaid at this point - you may want to have your fiance check into his healthcare and see how you are affected ... since you have a pre-existing condition, you may/may not be covered by his insurance right away...
