Could I be pregnant?

I recently had sex on my most fertile day, my period should be due in 6 days and I've been the most sexually active I have this month then I have any other month. I don't use any contraception and he always cums in side of me. For the past few days my body just hasn't felt how it usually does, I don't usually eat a lot and ive just been eating everything and a lot more than what I should. I have also got diarrhoea which i don't usually get. Just wondering if any of these symptoms are related to pregnancy or is it to early to test?