Is it possible to be pregnant with out sex because ive been getting cramps but no period and people say im pregnant but ive never had sex?

Techincally yes.

Have you ever engaged in sexual activity where the guy has ejaculated? If any sperm from the ejaculate touched your underwear or vagina, even without you having actual sex, technically you would still get pregnant.

Now, maybe your cramps are caused by something else, like food poisoning or just the stomach flu.