Hello doctor! I am very scared to get pregnant since

Patient: Hello doctor! I am very scared to get pregnant since I’m a virgin and I had my first “contact” with my boyfriend today. Let’s say we were in his bed and we were in our underwear, he had precum and he dry humped me, right over my vagina but he had his boxers on and I had my panties on too. He only had a small sport of Precum on his boxers and I guess I was wet cause of myself too. I can’t stop worrying since then, what if I get pregnant? I read some forums saying precum can’t pass trough clothing, but is it true? I can’t buy anything because it’s pretty expensive here where I live and I can’t tell my mom because she’ll kill me! Please help me stop worrying and tell me if I can get pregnant by this or not! Thank you!

Doctor: