Super late AF but still getting BFNs

So this is my second month off birth control. Last month my cycle was 25 days. This month I'm on day 31, still getting BFNs. I know coming off birth control can make your cycles go crazy but I feel like this is really late??? I had terrible fatigue for a week now and nauseous in the mornings while I'm eating breakfast. While I'm eating it gets hard to swallow bc it feels like I'm going to throw up. I have never ever been nauseous while eating breakfast like this, not even around my periods. Is it possible that my period is just super late or possible that I'm pregnant? I just need a sign one way or the other, waiting this late is hard!!!