Concerned need advice 2

So the last time I had sex was around May 22 with no protection. I have taken two pregnancy test last week both were negative, done two days apart. I haven't gotten my period yet but I do take medformin to regulate my cycles. I have been feeling very bloated, tender breast, slight indegestion and always feeling full. My cycles can be irregular at times, so could I just be having symptoms for a late cycle or could it be pregnancy?? Having a hard time seeming the comments on this post