Post Op Hernia Repair Problems

I had an interior hernia repair in mid July to repair both a hernia and hydrocele. Currently, I am still as swollen, as I was the 1st week of the surgery. I have been swollen now for over four months. I have started to get small sharp pains in my upper right leg (right side repair on the operation).
I went beck to the general surgeon who referred me to a proctologist. The proctologist said I still have some blood that has not been able to drain; therefore I have a hard sac of fluid in my upper groin. He sent me to get an ultrasound. The ultrasound confirmed there are two sacs present. The first being the hard sac of fluid in my upper groin, it almost like a hard half roll of pennies. There is a second collection of fluid around my right testical. Apparently when they cut the hydrocele, the testical began to produce fluid on its own accord (that’s what they relied to me, as I have no clue at this point from fact or fiction). When I got the ultrasound they confirmed blood was still following to the testical, which relived me because I did not want to lose one of my most valued possessions. So now the proctologist told me to wait another month before seeing him again.
My question is why did this happen? How common is it to be swollen at this point? What is the medical term for my case? What percentage of hernia operations result in my symptoms? What methods should I look into for repair? What is my hydrocele not fully repaired? Is there any additional information I can use?