Missed period, tomorrow was supposed to be my last day

Jess

Hi guys just want your opinion please, My periods are usually 3 days long and I was due on 27th but no sign yet, but my nipples are tender I’m bloated and extremely sleepy all of the time, I’ve been having major hot flushes too, I did a pregnancy test tonight but came back negative, I’m almost certain I may be pregnant, do you think I’ve just tested too early. Thank you x