6days late

So I had two periods last month a week a part from each other. When I Came on my second period I took my bc pill which is to help lighten it but I stopped bleeding. Now it’s jan and I’ve had stomach cramps for about 2 weeks. First week thought it was because I was getting my period. Now leading up to the day I was supposed to start (last Saturday) I was cramping on and off with no bleeding or spotting. Here it is 6days late and still having light cramps. Should I test even if on BC.?