Pregnant?

I gave birth almost 3 months ago and every time I eat I feel sick, I’m always tired and my stomach feels funny especially when I lay my son on my stomach. Me & my boyfriend/babydaddy don’t use protection at all and I just finished my period. The month that I got pregnant I also got my period but didn’t find out until the following month and I ended up being 6 weeks pregnant. I honestly don’t know if I’m pregnant or not.