I had open hernia surgery a week and a half ago, I'm only urinating twice a day even though I'm drinking plenty of fluids and I have only had two BM's since I came home from the hospital. Is this normal?

Maybe. You really need to call your surgeon. While it is unlikely, you may need a bladder catheter.
Family practice. Since you had an open hernia repair vs a laparoscopic procedure it will take you awhile to fully recover. You probably haven't been very active. Keep yourself hydrated and as your oral intake improves it should get back to normal. But call your dr and let him know what's going on.