I have been consulting posts and other things online but now the situation is getting so complicated that I feel like I have to post my own thread ...

So basically I have been having (unprotected) sex with my boyfriend for about two months now. Now, recently we thought I might be pregnant, so I took the morning after pill, within 72 hours of the first time we had had unprotected sex since my last period. Apparently this is 60% effective (since it was so late since the possible impregnation). Then, maybe a week later, I got my period. However, although it seemed pretty usual at first, it tapered off almost immediately, like within 12-24 hours, until it was basically just spotting for the last 3 days. It "ended" two days ago. Then yesterday I decided to take another pregnancy test, and it was negative; however, the second window (the one with the pregnancy line, not the control) turned pinkish, but not like a line, the whole window took on a pinkish hue, almost immediately. Then today I got brownish spotting ...

... So my question is, is it possible I am pregnant? Since I "had" my period, shouldn't a test be pretty effective at this point? Should I take another test or does it seem like it's probably fine ... (i don't know, maybe the weird period is because of the morning after pill?)?