Could Brown Spotting Be The Symptom Of Pregnancy?

hi, i am very scared that i could be pregnant... i have one "symptom" but it hasnt even been a week since the encounter, but all that happened was that he put his "tip" inside me and then pulled out because i said it hurt. i dont remember feeling full on penetration. and i am pretty sure he was protected. But could i be pregnant? Today i noticed some brown spotting and i have noticed a very very slight discharge yesterday and today... my period is supposed to come around the 27th of june i think, or sometime around that. But im terrified... what should i do?