CD35, no AF, high bbt but irregular periods - could i still be pregnant?

Jade

So I’m on CD35 with no sign of AF arriving. My periods can be pretty irregular, ranging from 31-37 days. My bbt is still high after seeing a distinct rise after the first half of my cycle. At 7DPO had symptoms of very sensitive nipples, sore lower back, cramping/ bloating but they have disappeared now bur still have a high bbt. Took 2 tests both BFN but earlier in my cycle. Could I still be pregnant or should I wait another week to see if AF comes?