Hello I Had My Son About 17 Months Ago. Since

Hello I had my son about 17 months ago. Since having him I have been put on 3 different birth controls because I was having my period every day for 3 weeks straight every month. None of the birth controls worked so I got upset and stopped taking my birth control on November 3rd. I stopped bleeding on the 6th. And about a week after my bleeding stopped I began experiencing very milky white discharge, an awful backache that travels in my hips and thighs, bloating, headaches, very slightly upset stomach, tons of gas, very uncomfortable cramping, and insanely itchy hives mostly on my boobs and legs. I started my period on December 2nd and it only lasted 3 days. It started out with a light flow of bright red blood and bathe next day became brown and blood tinged discharge. I've taken tons of pregnancy tests and they are all negative. My husband asked me to start my birth control back but I just don't feel like my self and I'm worried that I may be pregnant even with the tests being negative. After intercourse with my husband my lower stomach starts cramping and is very uncomfortable for awhile after. I just don't understand what could possibly be going on??