pT3b - what were your radiation outcomes after radical prostatectomy?

I would like to read comments from anyone who was categorized a pT3b after radical prostatectomy (RP), and had radiation after their PSA started to rise:
1) At what PSA level did you start radiation, and how long after your RP was it, before your PSA started to rise as a pT3b?
2) How long did your physician wait after that PSA level rising before starting radiation?
3) For those whose cancer came back within the expect 5 years post-RP, "when" did it return (1 year later, 2 years later, 3 years...etc.)?
4) What were short term and long term consequences of radiation? I have heard horror stories about radiation" permanent ED, bladder cancer, severe pain, etc. I heard it is "40" consecutive DAILY sessions of radiation. How did that go for those who had it?
My current status is as follows:
3.5 months post-RP. PSA is now < 0.1 ng/ml. But, I had cribriform glands, EPE, surgical margins, and slight left seminal vesicle invasion - thus the pT3b category. I was and remain a Gleason 3+4 = 7 with only 6-10-% cells being "4", so really was "almost" a Gleason 6.
I really hate that my life has now changed "forever." The first year, I will have a PSA every three months. If it remains 0.1 ng/ml, then in year two, I go to PSA levels every six months, and onward until/if my PSA shows 0.2 ng/ml or higher. That is why my physician said we will very likely start radiation. My life will be a constant worry, especially filled with anxiety in this first year post-RP waiting for my next PSA value, nervously hoping it will still be 0.1 ng/ml.