Your first concern should NOT be that you're pregnant. It's completely irrelevant what symptoms or intuition you believe may be compelling you to post here asking whether you're pregnant, your first point of call should be a doctors office to check for STI's.
We're not judging you for having unsafe sex (many, many of us have done it), we're worried that your priorities aren't in line.
Stop being so worried about an unplanned pregnancy; if you have an unplanned STI you could end up being infertile.