Unusual Pregnancy Symptoms!!

Julie • Hello! I am 26 yrs old & TTC first child with PCOS.
I have been TTC for a solid year and no luck even with clomid an provera. However, this month is a bit different as I was also prescribed Metformin. I've never taken this before but I've heard that it helps a great deal in actually conceiving. I'm not sure if I ovulated or not this month but I BD on my most fertile days according to Glow. I've been feeling fatigued, irritable, and have notice a lower back ache as well.. Also some very very light cramping in my lower abdomen. A few days ago I had a weird flutter/spasm feeling in my lower stomach and now i have what seems to be a yeast infection, itchy, no "cheesy" discharge and no odor but there is a milky odorless and slightly sticky discharge. I used the bathroom this morning and noticed white discharge that resembled semen in the toilet. I've read that yeast infections are somewhat common after ovulation... But do any of you think this might be the real deal? 1 day away from AF with no real signs if her...need some input badly. I feel it's too soon to test and too afraid to see a negative anyways. Has anyone experienced this and been pregnant?