Really heavy and tenderness?

Okay so i had my period march 3-8th and 26th-31st. This is odd. The past week or so my s feel so heavy and sore. not unbearably sore but very tender. they feel very heavy when i take my bra off. im only a 36c and they feel like they just drop out of my bra when i take it off (the heavy feeling) could this be pregnancy symptoms??