I'm not familiar with this homemade prop/tren blend, or the person that made it, so it's hard for me to comment on the quality.
I will say if you were putting something harmful or dirty in your body you would probably know it by now. This is one of the reasons I don't like this bootleg stuff.
I wouldn't expect to "blow up" on Winstrol, but your diet has so much to do with it only you'd know for sure if it was due to your change in diet or the drugs.
The easy answer would be to tell you to junk the stuff and start fresh with good gear. But I realize you have time and money invested in this current cycle. You are taking somewhat of a light dose of Prop and Tren, so maybe it's just hitting you now, and that's what you're feeling.
It's a tough call, maybe stop with the Winstol, and if the gains continue you'll know it was the blend that was working for you and not the orals. Yes, I like that idea. Do that.