Sharp abdomen pain

Last night I felt kind of a sharp pain in my abdomen around where I believe my placenta is. I think the baby's foot was wedged around there, but I still feel like there is something sticking into that spot even though the baby moved away from it. When I touch it even with a little pressure it hurts. I can't tell if this is muscle/ligament pain or something more internal. It's really not painful unless I put some pressure on it, but it does worry me a little bit because I also feel like I'm been feeling less movement since this started last night. I don't know if I'm over thinking this or I'm just feeling the pain of getting stretched out now that I'm 36 weeks. Opinions are welcome!