Pregnant?

Do you guys think I'm pregnant? We do it without a condom & he has came in me before. If I was preg I would be about 5 weeks. My symptoms areNausea in morning very very bloated gassy constipated migraines dizzines, dreaming often & cramping in lower abdomen, breasts a little more sore but not a lot.  My periods are irregular but usually happen every other month.  Please tel me honestly what you think. I've been trying to avoid buying a test.