Bloating after period?

So I have no idea why I’m bloated for the last few days. My period ended on Friday, and it took a bit for the swelling in my breasts to go down, but the bloating and constipation feels weird. I do have to note that I did have sex a few days before my period via pullout (way before he had to ejaculate). It also bothers me if there is some way that I could be pregnant, even though my uterine lining was shed. Could it be my eating habits? I haven’t been eating much for some reason for the last few days either.

Any advice is appreciated, because I’m so confused at the moment.