Can anyone help?

I'm not sure if anyone will have an answer but I don't know who to ask anymore. My dr isn't open until Monday.

I took two rounds of clomid so far ( on third round). First af was normal, nothing different, my second af was light and only lasted about two and a half days. I took a htp and it said negative. So my dr gave me clomid again. I am on day three of taking them. My breasts have been sore for about 2 days now. I took another htp and it said negative. I don't know what's going on. I've never had sore breasts before ovulation. On top of all this clomid causes birth defects if taken while pregnant. So I'm even more worried. I don't know what to do.