Should I go to the ER or wait?

THAT
I don't know what to do. I'm scared something might be wrong with my baby. I just turned 8 weeks pregnant today. I've had some dullish sharp in my lower abdomen since last night. Other than the pain everything was fine until just a bit ago. TMI* I went to the bathroom peed and pushed a bit because it kind of feels like the pain is gas but nothing came out. So I wiped my self and (I wish I thought to take a pic) I had a large amount of discharge (if I had to measure maybe about a tablespoon amount) on the tissue that was regular color but with brown streaks in it. My doctors office is closed until Tuesday because of July 4th. I did have sex 2 days ago so I don't know if that could be the issue. I'm kind of freaking out. Had a Partial Mole in April and I'm so scared somethings wrong. Has anyone had a similar issue? Is it normal? Should I watch it or just go to the ER to be on the safe side?