You have BPH. It's benign. It's common in old farts. If there is no family history or you have no other extraordinary risk factors, don't worry about cancer.
Getting up three or more times a night can be because of incomplete emptying as well as, as we age we don't sleep so soundly so having to go will wake us. I was forced to use catheters until my surgery, and it wasn't all that bad once you get used to it. I tell you what, using a catheter to empty out just before bedtime can get you hours of sound sleep. Don't knock it until you try it as the saying goes and I mean nothing personal.
In my own case, towards the end, I was peeing every 15 minutes because I couldn't empty out. When I would go, I would go until it stopped like everyone else on the planet. The difference was, when I felt I was done, there was still 95% in my bladder. So, it only took a short time until it got to 100% again and I had to go again.
It was so bad toward the end, that I had to plan trips. I knew where every rest stop, outhouse and convenience store was within 500 miles.
And, fwiw, I've never felt any relief with all the herbal stuff like saw palmetto. I'm not a believer.
Good luck, friend. You will be fine.