hi. i had sex with my bf for the first time a couple weeks ago. we wore protection and it didnt break, slip off or have holes after. my last period was feb. 20th but my periods are always irregular. i still havent gotten it this month but i just got brownish pinkish spotting today but thats it and usually its alot more. could i be pregnant or is that just because my body wasnt familiar with it? i havent had sex since then. but im also very stressed as well and that might be pushing it off. what should i do?