Ive been on the minipill for about a year now. Thursday night I had sex with my boyfriend, then forgot to take my pill Friday and didn't remember to take it until late Saturday when I started spotting. So my question is, what are my chances of pregnancy?

Yes you could, but you'll have to wait.

When you have sex, no matter what you take, or use, the chance of getting pregnant is ALWAYS there, and finding out for sure is ALWAYS a waiting game.

Odds depend on when you happen to ovulate, which can be irregular with the mini-pill. Missing two days, you were basically without protection after Thursday, however, most likely you won't become pregnant, simply because the odds of someone trying to become pregnant are relatively low in any given cycle, but you could see about taking plan b even today. Not as effective as it would have been taken sooner, but still helpful.

You might want to consider setting a phone alarm for helping you remember to take the pill. You could even keep plan b on hand in case you run into the same situation in the future. It won't stop a pregnancy, in case you are already. As was said, waiting would then be all that you can do.