Frequent Urination Gyn says it's vaginal infection?

I am 31 year old healthy female. I was having pelvic pain in mid Nov. and was diagnosed with UTI. Was treated for this and was fine for about 5-6 weeks. In early Jan. I began having pelvic pain, cramping, and frequent urination again. Thought it was another UTI and took Bactrium doctor had given me for "in case" situations. This done nothing to help. Went to a walk in clinic and was given Cipro....was better in 4 days with very little pain left. I went to Gyn for urine check to make sure it was clear and it was but she said I had a vaginal infection. Also, insstead of letting me pee in a cup she done a catheter for the urine sample. This HURT!!! Since then I've had the frequent urination and mild on and off pain around my bladder. Gyn says it's the vaginal infection, which I'm taking Flagyl for. Does this sound right?

I've also come off of Birth Control and thought Ovarian Cyst may be happening again. I was put on Birth Control about 8 years ago because of very large cysts. Gyn said she could not feel them in Nov., but I don't think she felt again the last time I was there.