Broken n confused

The app predicted my highest fertility on the 11th and 12th of May i made sure to give it a try on both days...my period is two days late...i did the test yesterday and it came out negative 😖😫my sense of smell is very enhanced..my nipples were sore and sensitive..i have very light cramping that doesnt stay long...very tired..either extremely hungry or not hungry at all..and i do feel nauseous but not throwing up..i dont know what to do...can i please get some advice what I should do?