I’ve recently went on birth control

I just finished a pack

Since I have been waiting to have sex until I went on the pill my boyfriend and I kinda rushed to it

I read that after the first week I should be protected

So we had protected sex at the end of the second week but the condom slipped off when I got off because he didn’t hold it down

I’ve taken the pill at the same time with only one exception I took it an hour and a half late once but other than that I’ve been punctual. Is the spotting a possible indicator of pregnancy????