 [ Symptoms ] late period bloated upper stomach occasional dizziness and nausea what could it be  im 26 yrs old and my period is 2 weeks late although my last period was 2 weeks early i occasionally get very dizzy and feel nauseous i have noticed my upper stomach above my belly button feels hard sometimes and seems like everytime i eat it feels like i ate way too much when i do not i took a pregnancy test and it came out negative and i have been gaining wait slowly over the last couple years what could it be pregnancy vertigo reaction due to the weight gain or something else [ Disease ] the two issues can certainly be in the same person but may not be necessarily linked sinusitis chronic sinusitis may need to be addressed as a separate issue and sleep apnea can have many different causes please see some experts and ent and have a sleep study