I think that the odds are still with you for being pregnant. Your temp should've well and truly dropped by now. Your temp is actually higher than mine is each morning and I'm pregnant.

Vitex doesn't alter your temp at all. I was taking it for several months and my temp always dropped 24-48 hours before AF arrived except for once and even then it dropped the second day of AF.

Some women do experience bleeds that resemble AF early in pregnancy so if I were you I'd be doing a HPT.