I had my period this month but it doesn't seem normal, normally I would have period cramps on the first day of my period but not this time and I would have my period for about 5 days but it ended in 3 days for this month, the period flow was less than it would be usually. I didn't miss any period for the last 3 months if I'm not mistaken.. could I be pregnant?:confused:

No, you won't get your period, but you may have some bleeding around the time of your period. Most often it would be lighter or shorter in duration than the norm.
The change in your period may be due to pregnancy, or it may just be an off period. You could try a pregnancy test or wait until next month to see what happens at that time.

Could it be stress or pregnant?

Could be either... stress effects people differently. Many women won't have any changes in their cycles, even with a good deal of stress... others find that changes in their cycles is one way their body responds to stress.