Oh, I got ya -- so you could either be 35 DPO or still waiting to O, right? It would seem unlikely, but not impossible, to not get an accurate HPT at 35 DPO. But maybe you ovulated later than you think.
I don't know about the bloating and vitex specifically. But I do know that I get some bloating right around ovulation time (which makes me feel oh-so-sexy just in time for BDing) so maybe you are Oing now.
I think bloating is a common response to a lot of things. Be sure to drink a lot of water, because dehydration can cause bloating too (believe it or not!)
Mama and co-parent to our beautiful DS (08/08) and our mighty strong DD (04/10) . Life is good.