Nolva turned to glue... help?

Hey, a while back i got some nolva from pnp, and it had flakes floating around in it. I heated it up in hot water first and left it in there too long and it all stuck to the bottom... a white mass and clear liquid. So i heated it again and stirrred it the whole time and it turned back into a white liquid with no flakes. THat was a couple of weeks ago. Since im not using it during my cycle, i havnt cheked it but when i opened the cap the other day it was almost just like glue.. it was all thick and white and was like cream cheese/ or glue. Heck i dont know whether i should try heating it again or just buying some more? anyone ever heard of this? :unsure: