Back and abdomen pain

Re

I’m 12+1 and I’m having pain, not cramps, like what feels like deep, bruised pain in my lower back and low abdomen. I’m a runner, and I’ve been running consistently at comfortable paces so far this pregnancy, but does that have something to do with it?

I just lost a baby in December and I’m scared 😔

Edit: I ran today, is why I mentioned the running, and the pain has just increased since this afternoon.