Best brand of king sized mattress?

Ginny

So as of now I'm sharing a full size bed with my 200 pound body building boyfriend and a 70 pound dog. I'm 16 weeks and not getting any smaller and I can't take it anymore!!!

I'm getting a king size bed..I just don't know what brand of mattress would be best. Any recommendations or brands to avoid?!

Thank you!!!💜😪😪