12 days late

Hi guys! I'm new to this so bare with me! 
In the month of November I had to take plan b; and ended up having two (sort of) periods. The two periods messed my PH balance all up and I had to take flagyl for BV. I did not have a period in December and I'm currently 12 days late! I'm having weird symptoms that I can't decide if they are from PMS, pregnancy, or side effects of the two different pills. 
Symptoms include: slight to moderate cramping for a week now, breast and nipple tenderness for a week now, I had lots of creamy white discharge but now it's back to normal, fatigue, acne, and hot flashes! What do you guys think??? 
Oh I took a test when I was 7 days late and it was negative!