Safety of laying on stomach using a “cozy bump” type mattress

M

Well I tried the Cozy Bump and I thought it was really uncomfortable so every once in a while I’ve been putting couch cushions on the floor and making a gap for my belly and it is SO comfortable and gives my back so much relief..

but the last time I laid like that I got a sharp pain in my stomach and just immediately got up and I’ve been wondering if it’s safe to do that now that I’m 20 weeks..

Does anyone know?