Pregnancy related. Or it something else?

My periods date was 1 April ,we intercourse last time in 28 but my periods got delayed in between i do pregnancy test because I feel tired constipation nausea ets but it was negative after that on 12 April I got my periods but I got heavy flow for 2 days other 2 days normal very less, our last intercourse was on 17 April ,it's been may logically my periods has to be come on 12 may but it delayed it has been 27 may , I feel very tired,bloated ,my tummy hurts most of the time , nipples feel very painful ,oral health decreased and I feel vomiting 2 days after waking up most of the time sleepy and I don't know why my mood swings increase I got irritated easily heartbeat get fast ... I'm confused is it pregnancy or something cause my periods never get delayed ( in dec for 10 days it delayed) I feel so much uncomfortable but I don't sure about pregnancy, am i pregnant or it something else??