Nausea randomly while moving around

Does anyone else get super nauseous sometimes when getting up from laying or sitting down? I haven’t had any this entire pregnancy but now that I’m 31 weeks it happened twice yesterday. When I stood up from lunch I almost doubled over and couldn’t stand straight up the nausea and pain in my lower stomach hurt so bad and then yesterday evening I was laying in the bed and couldn’t get up out of the bed without nausea hitting only while moving and trying to get up.