Guess maybe it’s a chemical 😭

So I got my BFP Friday. I took it in the morning. I’m a night shift RN so my sleep schedule is all messed up. I took one at work Saturday night a digital and I got a yes + on a FRER digital. I mean if that wasn’t confirmation idk what is. I was pretty excited. But I took another one last night at work a FRER digital and it said no-. I was confused..and now it’s about 340 pm so it’s technically my FMU. (I know even though it’s the middle of the afternoon.) the one one the bottom was just taken. Definitely looks fainter than the one I took on Friday. Idk. Do you think it’s just because my sleep schedule is all off currently? Or you think I should call the doctor and ask anyway? Or just wait until my period comes? Thanks for your opinions ladies.

Update: I started bleeding. So I’m assuming it was a chemical/ Early miscarriage. I guess it just wasn’t my month.