contractions or not?

shonti
all day today and yesterday i just been having cramping and sometimes it hurts other times its just very aggervating . its consistant and hurts worse wen i stamd up to the poinr were im bent over wen i walk .... wveryone keeps telling me "oh youll know when your having contractions " BUT I HONESTLY DONT !! lol i just dont wanna go into labour at work 😩😩 
SOMEONE PLEASE HELP ME OUT !