Welcome! You have jumped in the deep end but sound as if you are doing well. I wish I could instantly cure the fluid problem, it's an irritation you hardly need but my body went into overdrive too and kept producing nutrient rich fluid to heal me, when I was healing just fine thanks and the only ones enjoying the feast were bacteria I really didn't want to encourage! It will stop but treat any infection-like symptoms quickly. Not the time to just hope they will go away.
Dr Google is tempting but rarely helpful. Unless you have known food intolerances, the answer is to eat as well as you can - fruit and vegetables, fish, meat in moderation (but avoid processed meat if you can). I have chosen to reduce dairy fat for general reasons.
One step at a time is a good way to travel generally - you still get there and have time to smell the roses. Best wishes for your future treatment.