Pregnancy scare

[JaneS487]

Hello! I am 23 and I had sex with my boyfriend aroud 3rd of November, it was also my first sexual experience. I have to admit it was an unprotected sex but I also can't say it was a full intercourse. It happened on two occasions but it was more like few pushes into my vagina. First time he didn't finish and the second time he finished on my lower stomach (above clitoris). On 28th November I got my regular period. But today is 10th of January and there is no sign of any period.
Of course now I got paranoid and I see all changes in my body as pregnancy. I am taking a pregnancy test tommorow but I am so scared I can't sleep. Is it possible I could gotten pregnant from pre-ejaculate or sperm on my vagina? Like something accidentaly got inside? I am having problems with digestion lately, I am bloated and I feel like I gained some weight but there were holidays and I ate greasy and heavy food and also overate multiple times so there might be an answer. Please tell me that I am just freking out for no reason.
Thank you for your help!