Help I need advice!!

My boyfriend and I did it without a condom and it was the first time for the both of us, we don’t know if he cummed in me or not but what should I do?? Please give me any advice you guys have. should I try and get plan b or should I just wait to see if I’m pregnant? Or if there is anything else you guys recommend let me know please. I’m honestly like really scared please give me advice I really need it