Am I pregnant? Please answer 🤔

I'm 16 and I've had two depo shots, my last one for now being in July. Well last night I had unprotected sex and I think the guy nutted in me I'm not sure but when I felt down there it felt like it was cum. He did it on my vagina and I'm pretty he didn't pull out fast enough plus he did it on my vagina anyway. and when I went to pee, I saw some on the toilet paper and I also think he rubbed pre cum on his fingers and fingered me. My mom got pregnant right after she missed the shot and my friends said I'm not completely safe since I've only had 2 and some more girls in this app say that their doctor told them that they are not fully protected until about a year . So I'm just wondering what are the chances of me being pregnant? If I am I'll keep the baby and my home is financially stabled and we will be able to take care of it. Also ive heard that the depo shot is not as effective as others claim it to be so please help I just want to know