More fears after appointment!

Kat
Saw our doc today at 11+3 and there are 3 things that have left me nervous...
1. I've had spotting on and off, so I asked the doctor if my chances of miscarriage are higher, and she said "to be honest, yes. But not a ton" and now I'm just nervous lol
2. She said my placenta is low and could be near the cervix, and that if I start having spotting again we will have to get some imaging done cause she's concerned about placenta previa. 
3. At all of our appointments our baby's heart rate has been high. 190 at 9+3 and she said 160s-170s today. She listened with the Doppler and then went and got an ultrasound machine after which made me nervous. She said it could be that I'm not drinking enough water, but my pee is basically clear and I feel like I'm drinking enough! Has anyone had a baby with a high heart rate all the time??
We did get to see our munchkin kicked and squirming. There are no bleeds around the placenta! So some good stuff, but I'm still nervous and she wants to see me again next week.