4dpo am I the only one going crazy ??

I know it’s too early but I’m 3dpo I had cramps all day in both of my legs and then this morning 4dpo the cramps stopped but then my lower back started aching , my breast are sore and I’m exhausted and tmi but I’m also constipated . Could this be a positive sign ?? By the way I do not get cramps during or after ovulation this would be a first time for me.