IKEA Sultan Forestad mattress, a replacement for back pain?

Hello,

I bought a bed/mattress etc. from the previous tenant. All from Ikea:
Bed IKEA DALSELV
Mattress IKEA SULTAN Forestad 160x200
Roller slatted frame

I cannot sleep well on it and often wake up with back problems.

I thought I should buy a new slatted frame AND a new mattress. Is that correct? Or would one be enough? (and then which one?). Do I also need a new bed frame?

The Forestad mattress I already have should (according to internet research) be rather good... but as I said, I don’t sleep well on it. When I visit my girlfriend I always sleep 1000 times better! And it’s not just because of the girlfriend :)

I am also afraid that if I buy a new slatted frame and/or mattress, they will be overall too "high" for the bed frame. Is it bad if that happens? Should I also buy a new bed frame?

My goal is, of course, to sleep well and not spend too much money.

Thanks in advance

hello!

so for me it sounds like you need a new mattress... if I were you, I would just drive to the nearest ikea and get advice there. they also know what can be best combined so that it fits perfectly. then you don't have to worry about that already :)