need your help

Hey girls so I need your guys help so I been in birth control for 3 years now and the 3years are up. I have the implant in my arm so for the last months I been getting my period regular and I just got into a relationship we been together for one month and 12 days we been having sex with out protection so am worrie I had to haven't gotten my period this month is late I took a pregnancy test on Thursday nov 17 I needed to get my period nov 14 was it too soon for me to do a pregnancy test it come out negative now it nov 22 and still have not gotten my period my stomach is bloated and I feel nauseous when am done eating i been drinking water like crazy so what do I do ???