So help I need some advice

Madison

So I had sex a week and a few days ago with my boyfriend it was like on the 3rd or like second last day before my period. We used a condom and everything but after some of his cum got on my leg I stupidly touched it then touched my labia and vagina lips. I didn’t actually stick my finger inside me. I wiped off my vag with a towel then we proceeded to shower and I washed down there also. Now fast forward. I’m during my fertile week. No sex but I’m getting a weird vibrating feeling on the right of my body below my belly button. Not exactly like uterus I think but a bit above this. I was also stupid constipated but that kinda died off. This is my second time having sex. The first time I actually took plan b bc I was so scared. Could this be messing my body (which was like a month ago). I managed to have a full cycle after my first time and the plan b my period seemed to be relatively normal besides spotting before it started. My body just feels different know especially like down there. I can’t tell what’s normal and what’s not. Like could I be pregnant. Which is my worse fear....I don’t really wanna buy a test a week from now. I was planning to actually get some b control. Any advice for a newbie? Could I be pregnant? I’m freaking out