Chance of pregnancy???

Jessica

So I had sex with my husband sept 1stand he did his business inside of me then got my period the very next day now today is 3 weeks later and I feel light cramping and some nausea and my boobs are sore I’m prob just about to get my period again in like a week but is there a chance I could be pregnant???? This would be our 2nd child we currently have a 15month old son,