Period 4-6 days late

Bridget
4 - 6 days late (my cycle is usually between 28 and 30 days ) I'm cramping, sharp pains in my stomach, nauseous(I've even vomited), boobs are sore and sensitive, and when I'm not feeling nauseous, I'm eating everything in sight.... Me and boyfriend don't use birth control, he pulls out. What are my chances of being pregnant? Please help!