Need advice for early pregnancy

After two miscarriages, I am pregnant again. 4 weeks and 2 days. I had been running 3-5 miles a few times a week before I knew I was pregnant. Now I’m terrified to go running or even do light yard work. I just want to make sure the baby implants firmly and won’t somehow miscarry from exercise. Does anyone have any advice on this? Am I being crazy or should I wait? I’m going to ask my doctor tomorrow because they’re getting a repeat HCG, but I’m just going crazy feeling I’ll lose another baby.