1st PSA after brachy and SBRT (ADT to continue)

So, I have a regular GP doctors appointment coming up in 2 weeks. He sent me for bloodwork and also requested a PSA. I got the results today. PSA <0.1. This was from Labcorp. In October, I have my first bloodwork to be done by MSK. I wonder how much, if any, the lab results will differ. I'll change my signature after I get my results from MSK, just to reflect numbers from the same lab.
I know everyone hopes for that <, and at this point I'm happy with the results. I remember seeing something about a bounce in PSA after radiation. Something I should be on the lookout for? Or is it normal?
At what point in time do they say, OK, this is your new starting point?

Thanks Allen. SE's so far are minimal I would say. I'm still dealing with some bowel problems, which have subsided a great deal since they started 2 days after SBRT. Frequency, gas, loose, never trust a fart, as you said. On the urinary side, still having some stream issues (starting). But that also seems to be improving slowly. I'm not currently sexually active, so no report on that front. Other than that, the ADT is kicking my burnt butt. Biggest issues there are fatigue, hot flashes and weight gain. Fatigue being the worst.

PSA while on HT doesn't mean much other than HT is working or not.

Once you're clear of that you'll get a better idea if the RT worked.

In the mean time, enjoy life!

Andrew