Could I have a pulled a muscle? Or something else.

I was getting off this high bar chair and I grabbed on to the handles to get off because its so high that I had to put all my weight on arms. Well when I got off I felt a strong cramp on my lower abdomen. It feels exactly like if I sprained a muscle. I'm worried that something might of happened or if this is dangerous, like if my placenta detached ( I really don't know lol) I am still kind of achy but I feel her moving and kicking away like usual. Is it possible to sprain an abdominal muscle at 34 weeks? or could this be something else?

Thoughts...