Cramps since fertile window

olivia

I usually don’t like picking apart symptoms I experience in the TWW but ive been experiencing mild cramping off and on since the beginning of my fertile window, according to glow im due for my period today but no sign.. not the usual intense cramps I get, last night the cramps were so bad that it went into my back and I had nausea at night.. did any ladies experience this before a BFP?