I'm 32 weeks pregnant and I suffer with terrible back pain too. My sciatica triggers pain in other areas of my back and there are times I find it too difficult to move. My GP prescribed me stronger pain killers ans referred me to physiotherapy to help with the pain. But I'm doing the same as you, and using hot water bottles, warm baths etc to help with pain management. I also bought a maternity belt which helps with the pressure when I stand x
Thank you definitely going to talk to the doctor and midwife about it as really struggling to look after my toddler in this amount of pain everyday x
Speak to your midwife and ask about referral to physio ❤️