Still not feeling the same.

Is any one still not feeling a 100%? I'm almost 8 weeks pp and I'm still having abdominal pain, especially after any physical exertion. I had a normal vaginal delivery, no tearing or anything. Hubby and have had sex and I don't feel good afterwards. Lower back pain and cramping. Is this normal or should I see the doctor. I went in for my 6 week check up and everything was fine. Anyone else feel this way? It's my second baby.