Confuse and concern

I'm within the 2 week of getting the next deposit shot(Dec 12- 26.) I had sex on my period while light for the first time last week Friday. My period finally ended after starting since Thanksgiving light mostly yesterday. Couple hour in today, I felt a sharp pain like cramp when to the rest room a see blood. Is there a chance I can get pregnant? Within my period ending for less than a day I notice some white discharge. Google search and notice sprem can live to 5 days within your body. Even if your on your period and had unprotected sex there is a chance you can get pregnant. My situation is different so now I'm concerned. I had unprotected sex and he cum but I was within the window of the next shot 🤔 Does anybody bless for almost a whole month within the 2 week window of getting the next shot? HELP!!!;