Delayed Period and Spotting and Frequent urination after loosing virginity

i have lost my virginity recently..and now its 3 days after my usual period but have no period..and dark brown spottings are there .. and frequent urination..am i pregnant? my boyfriend was in me like short..but he came out..he did not ejaculate in me.. can i still be pregnant? i know these are some pregnancy symptoms but i dont want to be.. so i am asking.. can this happen cause of loosing virginity or am i pregnant? need help ...