Week late, BFN?!

Amanda • Proud Mother and Wife to my little family
Hi Ladies,
Hubby and I have been TTC for over a year now, and while I've had some medical issues in the past, for the past year my period has been very regular sometimes a day or two late (or early) but never past that. 
About a week before my period I started having mild cramping and figured AF was on her way. But then it never came... Spent the whole week with more cramping, slight upset stomach started yesterday but nothing major.
After being officially a week late (yesterday) no period - no spotting - took a test but it was a BFN.
Has anyone else been through something similar and still was pegnant? I figure if still no period by end of this week I'll take another test... Maybe see a doctor? 
I don't want to get my hopes up too high, but this is the longest I've gone with no period in a year!