Pregnant

So I don’t know if I’m pregnant or not.... I was 72 days late and only had it for 2 1/2 days. Then I was 32 days late and only on for 2 days. Then I was 32 days late again and only on for 2 days. People have been asking me if I am pregnant because I have been gaining weight in certain areas. I’ve told them no but I don’t know if I am or not. Can someone please help in some way to make it clear.