I'm so paranoid.. please read

So I had sex during my ovulation phase and I wasn't sure if anything leaked down there.. So I took a plan b after consulting a pharmacist and he told me to take it immediately. So I did. Because I was paranoid I even took a pregnancy test which turned out to be negative, and yes I do get my periods BUT there's this fluttery feeling in my stomach ever since, my stomach feels different, I gained a little weight, I can feel a weird sensation that could be mistaken as kicking inside my stomach?? 😭 and theres this hard part like right under my bellybutton that can move a little?? 😭 and I can feel my heartbeat even more ever since, am I just paranoid and anxious or should I consult a doctor? I know it sounds stupid and I've been too scared to ask anyone irl since I'm scared of sounding weird but I really do need someone to tell me what to do about it.. no judging pls 😭