AF due the 18th! These are my symptoms!

Rebecca
Hello all, i am 5dpo today and i literally feel like crap. Since the day after ovulation ive been having cramps and creamy cm. Today i have a terrible back and body ache as well and i feel like i have a fever. Still have cramps too. A little Decrease in appitite as well. I never get any syptoms before my period so this is weird to me. Anyone else ever have this and ended in a bfp!!??