1-2weeks ago me and my boyfriend had unprotected sex but I got scared and took plan b 30 minutes after the incident which was 1-2weeks ago. We had unprotected sex again 3 days before my period (he did not ejaculate but his pre cm may have contained sperm because he did ejaculate before and did not urinate yet) and my period starts on the 15th. It is now the 16th and ever since yesterday (7/15) I've been having scanty brown blood and no period pains. This is very unusual knowing my cycle. I usually start with a decent amount of watery red blood then after that I start bleeding non stop until the end of my period (7 days) but this time it's a little bit of brown blood that isn't consistent. Could this be my body reacting to the plan B I took 1-2 weeks ago or am I pregnant?