Chronic nausea for over 1+ year after childbirth

Hi everyone,

I am new to this forum and want to tell everyone my story to seek some advice.

My symptoms are
Severe 24-7 nausea
Bloating in lower left abdomen
Constipation
Fullness after a sip of water or bite of food
20+ pound weight loss

I've had stomach issues (nausea) since childhood, and has gotten worse with age. I wad diagnosed with IBS at a young age, but dont believe that is my issue. Shortly after giving birth to my daughter 1_15_11, I started expieriencing dibilitating nausea that lasted early in the morning to the late night. I am barely able to eat, have no appetite and have seen docyor after doctor only to be told its in my head.

I have been tested for
Lymphoma
Lupus
Tb
Hiv
Hepatitis

All were negative, ct scans found a 3cm ovarian cyst, ultrasounds were negative as well! This has caused me so much misery and no doctor will listen to me! SEVERE CHRONIC NAUSEA, SEVERE BLOATING IN LOWER LEFT ABDOMEN, NAUSEA AFTER EATING, STOMACH "LUMPS" IN MY MIDLINE! any advice? Im begging!