Big gal little car

So I haven't drove my car in weeks

I am 33 weeks pregnant and this morning drove my husband to work

I drive a Kia Rio and I noticed when I went to get in and then reach to close the door I pulled my belly really hard and may have been over too hard

My belly has felt tight ever since...

Would doing something like straining my belly or bending over too hard hurt the baby or cause placental separation?

The weather is supposed to get bad and idk if I should go to hospital or not but my belly hasn't been feeling good ever since...