Period day March 26-27

Gail
Who has a period starts to 26-27? 
And have a test and Pregnant now? 
Please comment below. 
Cause i am stressed thinking if im pregnant or not. I have my period last month 26th and now March 29th and i still have no period yet. I feel a little bit weird on my stomach its kinda bloated and its cramping in a few minutes and gone and a little bit headache and sore breast. 
Please give me an advice what should i do? Should i take PT or should i wait more for a few more days?