“Pain before and during ejaculation”

I felt pain in my left iliac during the last ejaculation. Currently, I have low libido and pain before possible orgasms. Thus, no ejaculation. I had varicocele ( left side) 15 years ago and hydrocele (left side) 10 years ago surgeries, and a stone kidney (left side) 4 years ago (which came out through a urine canal without surgery). For most of my life, I had a non-active lifestyle, but for the last 4 months, I was quite active: cycling every day and lifting weights. I usually have no left iliac pain, no swelling or bulge, and no sexually transmitted infection. What could be the issue? Thank you in advance.