also, I can still zip my double 0 skinny jeans with no problem and I feel like if I were pregnant it would be a bit of an issue but it isn't. so what causes upper abdominal bloating
I mean that doesn't really sound like pregnancy. You do bloat in the beginning, but not really up to your ribs, mostly lower stomach. Honestly I'm not too sure what's going on, but if the last time you had sex was may 2 and you are pregnant than you'd be at least 2 months and I think you'd have more symptoms. Just take a test, results will be really accurate by now