could i be….?

here goes..i had sex with my boffriend somewhere around the 15-16 of feb(not sure of the date) but i got my period on the 19 feb. it was normal, had my usual flow. i"v had to move to a different country to do my masters, and i missed my period in march. first i thought it was b’cuz i was in a different country and change in food and i did put on a little weight, but its april 16th now and i still have’nt got my period.
is it possible that i might be pregnent even after i’ve had my periods? i still have’nt taken the PT, cuz im jus scared of what the result may be. PLEASE HELP!!