Am I being paranoid or..? Pregnancy??Please read I need some help

Okay, I might seem uneducated or something but I’m being worried a lot. I’m 17 years old nearly 18 and still a virgin cause I never had sex but still did some stuff with my boyfriend😫. In the beginning of July I did some naked stuff with him but he never didn’t penetrate me, and he didn’t ejaculate anywhere near my body, he did it in a toilet paper. After it ended I got so scared and paranoid I couldn’t sleep at night and failed an exam due to the fact that I wasn’t able to study cause anxiety of possibly being pregnant hit me hard. It happened before my period, then I got my period but I was still worried so much. I was still being so anxious so I took a test later that time and got a negative. Thought I was going to leave this behind but I still continued worrying😞 now I’m so damn scared from any sexual activities even the SMALLEST ones. So it became a month since that happened and we both thought we got over it. Then doing love stuff like kissing hugging he always touches my butt and i was kissing his neck and he put his hand under my jeans and rubbed my vagina through my underwear . We were both in clothes and we just ate lunch so we both were hand-washed. I loved the way we were being close to each other but for a moment I remembered the scare and pushed him off and started crying for being paranoid back AGAIN. Even from him just touching me down there. It also happened few days before my period which technically came, it started light and for 2-3 days it became heavy then the last day brownish and light again. I am worrying about it being implantation bleeding. I’m so scared and I don’t know if it’s normal. My bestfriend tells me to go and talk with someone to get over it cause I’m really in a bad position in life rn. I used to be a party girl and loved to go out, take care of myself & the way I look, and study.. but right now I CAN’T do none of them, I just changed and I can’t get back to real me anymore. i really need someone to help me and understand me, cause Idk this is hard..