so sore

I know I have been posting a lot here lately about pain and other things happening with my body but it is because I'm a ftm and I want to ask to make sure it's nothing to run to L&D over something that is normal so here goes another question lol I'm almost 34 weeks pregnant and the last week my tailbone feels bruised. I haven't fallen and I am working full time but haven't noticed hitting my back end on anything. Is this something to do with pregnancy or no? I feel silly asking but it's really sore and I don't know what I could have done to it other then sit lol I am working full time as a vet tech so I don't know if being on my feet all day has anything to do with it either.