Hot flushes are generally related to hormonal imbalances. In women who are aging hot flashes are more common because their levels rise and fall and usually there is a simple fix for them like a plant estrogen birthcontrol pill. As a man you probably dont want to be taking femal birthcontrol though. I have had hot flashes too when im on fire and its 40 degrees outside and im freezin at the same time. Feels HORRIBLE! I noticed that if i run HCG at any higher than 250iu 2x week i have lots of hot flashes and sweat constantly. Anyhow back to you. Your body tries to maintain homeostasis which means you body adjusts what it needs to to even out your levels of test and estrogen. If test or est gets too high your body adds more of the other and tries to balance its self out. In your case, you completely turned off your test production and allowed for your estrogen levels to go through the roof! (more than likely) So although yes you completed your pct and turned back on your own natural production, your body is till trying to balance your test/estro scale back out to where it feels comfortable again. Hot flashes in steroid users are from rapid hormone changes in the body (usually, there are other factors that can affect your) they will sub side. I noticed that if i take P6 by cellucore when i come off that the ingredients in it helps me with that. (it raises your natty test levels and keeps a lid on estrogen at the same time and puts your libido through the roof

) So you can either wait it out or try and fight it but i wouldnt worry too much about it bro, you should be fine. Have you had your blood levels checked after cycle to see if you have returned to normal? if you go get a check find out what you E2 levels are also.
Hope i helped a bit