I got the warmth in the belly and tingle in the hands too - but for me, those were instead the first signs that the heavy blanket of oblivion (which I so desperately sought) was slowly creeping up and over me. It made me feel at ease, and yet completely uneasy at the same time. It lulled me into black-out "sleep" which I thought was the only way I could rest. Looking back.... I have a hard time figuring out exactly what I felt, because more often than not, I was intensely seeking numbness and, like I already said, oblivion.
Glad to be past that tonight