Well normally I have terrible period pains and the worst bleeding, but last months I hardly had pains or blood, a week after I had really bad back pain and stomach cramps, it would wake me up I was in so much pain I been feeling sick somedays, could I be pregnant? Quick replys please.

Assuming you have had sex, then yes, there is always that possibility.
Otherwise impossible to tell without an examination including blood tests.

Oops and yes I did have sex, and thank you!

Yes of course you could be , a light period is a sign of pregnancy ( first period in pregnancy)

So have you done a pregnancy test yet ? Do it with the first urine of the morning.

But I was due on my period again yesterday and I have still got cramping, should I wait a couple of days? :3