I think i may be pregnant and i dont knw what to think?

im 21 and i think i may be pregnant i know that i should of been responsible as so the man but people will make mistakes and im not the 1st and wont be the last....the thing is if i am i dont know hw i will feel rite nw my period is 5 days late i dont have many of the symptoms like sore but i do have lower back pain and slight twinges in my stomach and just constantly eating all the time wheteher i feel hungry or not...i also have quite alot of dischrge l8ly...the thing is if i am i dont knw wat i will do hw will i tell my parents shld i tell the father he was a one night stand but he is also a guy i knew to have the craic with but he lives in a different country....hw will i cope