Am having crampin n late period but tested negative can I pregnant

PLEASE, just ask once. Give people time to see your question.
Yes, any woman who has sex or allows a penis to enter her vagina even for a moment can get pregnant.
You need to wait 5 weeks after your last period started to start using pregnancy tests. Take a new one every few days.
Being late or even skipping a period doesn't mean 100% that you are pregnant.
A negative test result doesn't mean you are NOT pregnant.
So yes, women do have to wonder, wait, and keep testing.