Am I pregnant?

Me and my boyfriend had sex around 3 weeks ago with a condom he also didn't cum inside. A week or so after I had my period which lasted 2 days, stopped then continued after about a day pause but now I'm being sick left and right and I don't really know what to do haven't done a test yet but planning to on Friday but could i actually be pregnant? I had my period and the first thing that's really came to my attention was the sudden throwing up and nausea I don't have a fever or anything