Scare last night pain right now

Last night my husband and I woke up to a loud bang and found out dog laying on the floor and she had seizure.

I of course jumped out of bed and rushed to get dressed to take her to the emergency vet. Once I sat down there I started to notice a lot of lower back pain and cramping pain like I used to get right before my period would come.

Today I'm just chilling at home watching her but still having a lot of the cramping pain.

Should I be concerned that the stress did something.

I went to doctor's on Thursday cervix was closed baby head down.