What Causes Pain In Lower Abdomen And Spotting After The First Intercourse?

HI, 2 weeks ago I lost my virginity to my boyfriend, he used a condom and everything and he didn t even finish because I was in pain so we stopped. 3 days after having intercourse i was bloated and I had a feeling of being full, 6 days after having intercourse i experienced a brown discharge, I have been having it for 7 days now and today it was brown with a little bit of red blood, then it changed to completely blood, I don t know what it is and im getting scared because i was reading that they are symptoms of pregnancy. I DO know he didn t finish but I do NOT know about pre-cum, I was reading that precum is a possibility of getting pregnant. Also my period is going to come in 2 weeks so I don t think it is my period because that would be too early, I was reading that the brown discharge can be because of ovulation too. But i dont know about the red blood. Can anyone help me? Thank you!