bleeding

Im 9 weeks pregnant but when I was about 7 weeks me and my SO had sex and I bled a little bit. It wasn't like a period but it was red blood... it was kind of watery (probably cuz it was mixed with his juices) sorry tmi... but it didn't really last but maybe 5 minutes then stopped and then afterwards I had slight cramping which Iv had on and off this whole pregnancy so far. Is this normal or something to be concerned about? I don't see my doctor for another 2 weeks. Thank you for any opinions/advice. !