Hi I Am 30 Years Old. My Husband Has Been

Hi I am 30 years old. My husband has been fixed for 16 years I am always a week later than my period date so the last time I had my period was June 1st so I was supp to get my period on july 7th. Now I am going on 3 weeks being,late. I have been having very bad headaches, stomach pains, nauseous, lower back pain, feeling hungry at weird hrs, not sleeping good, diarrhea after eatting foods, I can't sleep on my stomach with out it hurting, the other day I went pee and I whipped and there was a white to clear oderless jelly discharge on the toilet paper. I took a cheaper pregnancy test a couple days ago it said no.