I GueSs I Have The Same Question As The Girl

I gueSs i have the same question as the girl before. I am 18 and i had actually my jeans on and my boyfriend too, however; he used to rub his penis on my vagina a bit.. I felt like i was hurt but i thought that was because of the jeans was so thick.. When i went home i came to find a little blood drop in my underwear, it wasnt big or very redish.. I wonder if is there any possible way that my virginity is lost? I dont think that could break my virginity, yet im stressed out wondering why that blood! And from where?? It did never happen before