Pelvic pressure

Hi so I’m 19wks + 4 days and I’ve got extreme pressure on my bladder area to the point I can’t even wear pj’s around my waist because it’s so intense. It’s just a constant pushing sensation and has been the same for around 4 / 5 days now. It’s definitely not a water infection as I’ve just been checked for that. I was told I had a low lying placenta so maybe it’s the pressure of that and baby, however I thought it would go away at some point but it’s constant. Has anyone else had this? It’s super uncomfortable