I bought a new mattress around week 10 because I was experiencing the same thing. I always loved my mattress but then I started getting achy on it and couldnt get comfortable. I also went out and bought a snoogle (body pillow) and it is the best purchase!
Best gift ever was this pregnancy pillow my husband bought me!!! Never been so comfortable!!! Invest in one u will not regret it!!!
I got one of those really thick mattress pads, it works wonders.
Not to be a party pooper but at one point your back will hurt all the time, no matter where you lay, sit or stand. It's obnoxious:/
Yes my regular mattress only gets me through about week 28 then I move into the spare room where I have an adjustable temperpedic. So much more comfortable!