pregnant but haven't had a period in 106 days..

I've been having real bad nausea but I thought it was due to the heat we've been having 100+ weather anyways so I took a test right now and it came back positive right away.. what are the chances of being able to get pregnant without a period? I'll be testing in the a.m again to make sure but for now has anyone else had a pregnancy with a irregular period or no period?