I apologize in advance for TMI but i just need some advice. 

I had sex with a new partner and when we did the condom accidentally got stuck inside me and a few days later I noticed a slight burning in my vagina and outside of it. It was very light and bearable, it honestly felt like I was just a little dry which sometimes has happened to me. Then, the next day it was still there and luckily i had an apt set up with my doctor regarding something else so I brought it up to her. I told her what happened so she tested me for Chlamydia and Ghonnerea (which both came back neg) and did an examination to test for yeast and she said that once she tested it immediately showed signs so she prescribed me diflucan. I took the medication and it went away within a day and I felt totally fine up until just today after a long week of drinking I woke up to my vagina BURNING. Does not hurt to pee whatsoever, no bumps/lumps/sores on my vagina or in after doing a vaginal examination. It felt like I was allergic to something (which has happened to me before) but I didn't do anything to bring that on. I had to make it to work so luckily I had yeast infection pain pills and a cream that I inserted and layed down for a bit and it went away. I had asked my doctor to please prescribe me more diflucan to see if it is indeed another yeast infection. I'm just concerned this has another underlying issue like possibly being pre diabetic? These infections didn't seem too far apart.  Has anyone experienced this? Anyone have similar symptoms to find the culprit? Any experiences would really help. As much as I care about getting to a doctor and having another exam, I really hate spending all this money to only be given simple answers I could figure out on my own.