You have not had aperid in 4months been having stomach crampsandwhen iwiped yourself there was some light red blood could you be pregnant?
If you are 4 months pregnant, you should have other (and more
obvious) signs. Your breasts should become tender to the touch (or
even hurt a litle) by 2 1/2 to 3 months.
There is always a chance of pregnancy so I would advise you to
see a doctor. Your cramping could be something worse than
pregnancy. Go to your local health department if you don't have
your own doctor and get yourself checked for peace of mind,
especially if your cramping is worsening.