Could Spotting Along With Abdominal Cramps Be Symptoms Of Pregnancy?

Had unprotected sex a few times since my last period ended on the 15th of January including the day I ovulated had spotting 2weeks ago which I believe was implantation bleeding having a lot of symptoms such as bloating, had cramps, veins are very noticable in my boobs, at one stage I couldn t eat any food whatsoever for a few days, feeling full quite quick, urinating a lot, and exhaustion is the main one,always feeling warm too my period is a week late now and still no sign of it, tested 2days after my period was due and got a negative pregnancy test could I still be pregnant?