Im 21, female, been recently treated for uti (antibiotics) and on going treatment for yeast infection (antifungal). I took plan b (levonorgestrel pill) on the 20th jan, I had sex on the 19th, and got withdrawal bleeding for three days, one week later. I took another plan b (levonorgestrel pill) on 10th february, had sex on the 9th, (i asked my gums before taking it). Both times I took it as a precautionary measure as my partner did not ejaculate inside me. My last period was 9th-11th jan. So my question is that I still had not gotten my actual period after I took the first pill, just the withdrawal bleeding and I took the second pill. Is that withdrawal bleeding enough to confirm that im not pregnant or should I do a test?