I think I'm miscarrying again

Cl
I started spotting early this morning when I got up thinking I had to go to the bathroom. Nothing happened but I had some brownish blood when I wiped.
 I was pretty sure that was it at that point but I waited until 8am to call the doc and I still hadn't really had much blood at that point. They told me it could be from constipation or intercourse. 
If it continues until tomorrow they want me to come in for an exam. I made it through the work day with just a tiny bit of spotting and I felt relieved. 
But then I walked home (~1.5 miles) and I had more brownish blood than before on my panty liner. I had a bowel movement and then there was red blood. 
I'm still not bleeding much but I've had 2 miscarriages and I just don't trust my body on this anymore. It sucks! 
At least this time I'm only just 5 weeks. Last time around, I made it to 9 and that was heart wrenching.
Sorry for any TMI