Should I call my doctor? 22 weeks pregnant

Today I had my usual doctors appointment with my OB, unfortunately I found out that short cervix and she told me to not walk as much and no sex and no lifting till she says it’s okay. Anyways later that day I’m leaving my friends and I fell in her parking lot I don’t think I hit my stomach to hard or anything but I haven’t felt her move since. And it’s been 4 hours