I believe the cough is actually associated with the BB or BA content and not the actual compound it self.
Recently i heard glutamine supplementation can fix that "heart burn" feeling.
The brownish urine is some what common with tren, I don't know its cause or how to fix that, other than make sure you're staying hydrated.
Tren can be harsh, sounds like either your sources recipe or tren it self doesn't agree with you. I'd probably stop your cycle now, and stick with test.