I am experiencing abnormal vaginal bleeding. my period is 2 days late. i have had unprotected sex recently. is this signs of possible pregnancy?

Maybe. Maybe not.: A urine pregnancy test, done correctly, gives a reliable result 3 weeks after sex (3 weeks after when conception might have occurred), 1 week after missing a period, or after starting a "weird" period. If done sooner, a positive result is likely real, but a negative result may be due to testing too soon, and thus lead to a repeat test. Tests are inexpensive and sold in stores everywhere.