Had a period last week, could I still be pg

Megan
I had my period on the 1st June til the 4th quite heavy at first since the I've been tired, nausea, sore boobies and going number 2 a lot. 
​It's very unusually for me to be I'll especially for this long but with having a period I didn't think I was pregnant til someone at work told me she was four months preg when she found out as she bled regular during her first pregnancy
​Should I test?