odd question about dbol?

im just finishing up my first cycle of test cyp which was 16 weeks@ 650mg. The first 9 weeks went really well gaining about 12 lbs, but after that i hit a huge wall only gaining 2lbs in the last 8 weeks. My diet and training was hardcore, all the way through i even upped the cals and fats the second half to compensate but still im stuck. I now realize that it was pointless to run it that long, at least for my first run.

My main question is ive recently been running some powdered d-bol @ 150mgs daily to try to boost gains and test the legitimacy of my new product. I started at 75mgs, noticed no weight increase. Now @150(i know thats high!) still no weight increase, but the odd part is the pumps are insane, and my low back is tight, and i feel kinda like im burning up sometimes, lol. Is this normal? I my body just gonna reject mass for awhile till after pct? Im wondering if this stuff is real, but even on test I get little bloat, no gyno,little acne. Could i just be very resistant to estrogen?

Sorry for the ramble, any advice/input appreciated?

so you started the dianabol at week 16 of your first cycle?

sorry for not being clear on that, my last inject was 10 days ago. I ran the d-bol at 75 for 3 weeks, now just recently( a few days ago) bumped up to 150, after getting frustrated