This is why you have to do your due diligence in research and not put your 100% trust in one individual. 16 weeks on an oral is a damn long time.. Get bloodwork done asap.
These guys are setting you straight. Don't guess, you'll potentially make things worse. Get bloodwork done to isolate the issue so you can approach it properly.
Looks like you got taken care of bud. Just to further drill the point, yes, you can lower the dose to 0.25mg e3d and I'd suggest taking caber in the evening before bed.
Unlikely if it's sealed properly and from a reputable source. Sounds like it just crashed a little which happens. You can post pics if you want so we can see it. I'd still try out what I posted previously and see if it clears up.
This can happen from time to time. You want to heat up the vial and let it reconstitute itself. Heat can be applied by putting hot water in a cup/bowl and placing the vial in it (water level should be under the rubber top). Let it sit for a minute and then gently swirl the vial.