should I be worried??

I had my period around the 22nd of May. My cycles usually 28 days and lasts for 5 days. I had sex around my ovalation days unprotected of course. Its now almost the 30th of June and there's no signs of my period. I took a test last night which came back negative. I also had a little bit of spotting on the 24th of June. I don't know what it is has anyone got any ideas?? My boobs are itchy my stomachs bloated I'm needing to go toilet more often the signs are there but negative test?? Please help