Hi, I had my last period on the 28th of Febuarary & protected sex with my boyfriend on the 5th. Ever since iv been worried about being pregnant, I have had cramps & very mild back pain which is common with my periods. I feel some pain when I press down near my lower region, which I link with getting my period. My period was due the 27th of March & is now 3 days late. My partner & I had sex on the 26th and I thought it was delayed by that but it still hadn't arrived. Is there any way I could be carrying or am I just worrying so much that it is delayed.