Unprotected sex..next day vaginal discharge and cramping

Hello all,

I am new to this blog. I have read other topics and wanna post my question here to get a better answer.
The first day of my period was 19th July. I get my periods very regularly.
I had an unprotected intercourse with my husband on 30th july. We are married for over 2 yrs and have sex regularly, but this time the next morning i started to have a lot of of discharge and cramps in my stomach and back. what does this mean? is there anything i should be worried about? like infection or any thing
Or is there a chance of getting pregnant
Please help me

Thanks a lot

congrats. your a mother