am i really almost a month pregnant

I think I might be pregnant but my boyfriend keeps telling me im not, but i started eating alittle more than usual, my breast fills fuller and bigger my stomach feels weird and swollen. I dont feel like doing thing's i would normally do i feel lazy, sometimes i feel like i am pregnant then sometimes i feel like im not just crazy. sometimes i would be mad then happy but not all in the same day, sometimes i feel sick but never throw up, i eat but dont really get full like i use to then hours later i wwill be hungrey again. my boobs dont hurt they just feel alittle firmer and heavier.maybe it's just me.