Endometriosis symptom?

I thought I had PID a few months ago because I kept having af like cramping and it hurt bad! They treated me. It got better and now it’s back and worse. Only I don’t have an infection. My question is does endometriosis cause a ton of pain when trying to exercise and walk around? I almost collapsed in pain after walking around the mall. Like...I felt like something was gonna come out of me. I was doubled over and the only relief I get is in bed with a heating pad and Advil. Sound like endo at all?