So I have just gone back on the pill this year after being on the depo shot for the previous year. I always take my pill, I don't ever forget. About 3 weeks ago I was on a week long course of antibiotics, which caused me to have some breakthrough bleeding when I was taking them. I was still taking my BCP as well. Once the breakthrough bleeding stopped, I continued to have sex, without any other means of contraception. Last Sunday I started the sugar pills of my pill packet. My period usually starts the night that I start sugar pills, if not the following day. On Tuesday night, I noticed that I had brown discharge starting, so I thought my period was coming. This was very light discharge, and the next morning it was gone again completely. I have had a few times where I have thought my period had started, but it was just this brown discharge, which I didn't need to wear any protection for it just wiped away. On Thursday I took a HPT, which come back negative. It is now Sunday again, and I didn't have my period at all in the week I was supposed to. I'm going to see a doctor on Thursday, but it is a nervous wait! Any opinions on what my body might be going through?