TMI but I'm a FTM and need advice

Okay, this is totally TMI but I need some advice. I'm a FTM, and I'm 16 weeks this Wednesday. These hormone changes are crazy and I'm finding myself very very in the mood. So I can usually orgasm through clitorial stimulation and I've been doing it kinda frequently. Especially this past week. Yesterday, I noticed blood when I wiped from using the restroom. I haven't felt any pain or cramping, but I thought it was really odd. Later, same thing still no pain. Late last night I experienced cramping. But it wasn't unbearable. Once I got home and In bed finally it felt much better. I had on a panty liner just in case and never filled it up. It's only when I pee. Since then today, it's been brown not red. And again it's only when I use the restroom. I haven't experienced any significant pain today. Just a little sore on my back which I read is normal for second trimester. I'm just really nervous and stressed out over this. I did use my at home Doppler and found the baby's heartbeat and that was reassuring but I'm still very nervous. Has anyone been through this??