I’ve been having trouble finding the right mattress. I’m a back and side sleeper and a problem I ran into twice was I would purchase an innerspring, be okay with it a few weeks then i would have trouble sleeping on my back. Probably because the center would sink in some. Would a hybrid bed be a good choice for avoiding this problem? I heard they don’t get too hot like memory foam beds do.
Hi JBR2022.
Welcome to our Mattress Forum. 
Sorry to hear of your back pain on innersprings. It sounds to me like a few factors may be at play, as you mention the center starts to sink after a few weeks of use.
One issue could be the bed frame. If you put the mattress on the floor, does the sinking correct itself? If so, this points to an inadequacy from the bed’s base.
This depends on why your previous mattresses are sinking after such little use. Would you be comfortable sharing your height, weight, and a description of where you need the most support (ex. women tend to need more support in the hips)? Do you know the model/brand of the innersprings you previously purchased?
Another issue you could be facing here is related to durability.
A hybrid with a memory foam comfort layer may still sleep hotter than you’d like, but potentially less so than an all-memory-foam configuration.
NikkiTMU
the innersprings I purchased were Simmons Beautyrest and Serta. I’m 6’2, 200 lbs male and probably need more support under waist and lower part of back.
Hi JBR2022.
It’s very likely that if the issue isn’t the bed frame, it’s potentially premature breakdown or that your body is requiring more support from that section of your mattress. You may be interested in a zoned mattress - you can learn more about that here.
A number of our Trusted Members sell zoned options or can help guide you through a zoned DIY.
NikkiTMU