I'm almost 4 months post op. Size 3 oval intramuscular. Should I still have that tight compressed feeling? (Photo)

I had butt implants and some fat transfer. I'm pretty thin . However I'm 4 months post op and I still very much am restricted such as I can't sleep on my back because it feels like two rocks back there. And I can't lean back on them eaither . I can set fine straight up though. My butt still tightens up especially in evenings when I've worked all day. I can't run or even walk very fast. My butt is still sore to touch above where implant is. Is this still normal healing time?