You could be pregnant because it doesnt always take a yr to be fetile again. I know someone who got pregnant on the shot and someone else who got pregnant a month after stopping the shot so take a blood test...... But you can also be having a weird period because your body may not be regular because of the shot. Are you haveing any other preg symptoms? How many periods have you had like this since stopping the shot?
yes you could be pregnant, it doesnt always take a year to become fertile again, some people take way less than that. id wait 3 weeks after you last had unprotected sex and take a test, the bleeding could be implantation bleeding