I'm freaking out...

My boyfriend and I got frisky the other night, Friday and Saturday and he ended up fingering me and I gave him a hand job and the first time it happened we were both doing it at the same time. The second time, he fingered me first and then I gave him a hand job so he couldn't have gotten any semen on his fingers and then inside me. I'm just scared because I'm sick today. Like I'm nauseous and keeping having to visit the bathroom. And I'm young so I really can't get a pregnancy test or talk to my mom. I asked my boyfriend and he said he's positive he didn't get any on him and then in me. Am I freaking out over nothing?