Going out of my mind....

Hi all, 

I need a little assistance, reassurance etc

The story so far:
2016: 
April -
Sweating, neck stiffness & throbbing, increasing lower back pain.
May -
Began feeling unwell - Dizziness and Nausea.
June -
Loss of balance, High BP, Persistent Migraines, loss of appetite, palpitations.
July -
MRI & CT of Brain - NED,
Referral to Neurologist - NED.
September -
BT - POSITIVE PNMA2 (Ma2/Ta) IgG
Chest wall pain, fatigue, hair loss, weight gain, abdominal bloating, abdominal tenderness, rectal bleeding, constipation and diarrhea, hip throbbing & leg pain.
October - 
PET Scan & Ultrasound - Suspect hot left ovary - Referral to Gynecology Oncologist & Colorectal Surgeon.
November -
Colonoscopy - NED, 
Laparoscopy (Gyno/Onco) - Left Oophhorectomy - NED, Peritoneal cytology- POSITIVE Metastatic Adenocarcinoma. Revised to highly suspicious due to minimal number of cells (<60) to confirm Dx. 
December -
Endoscopic Ultrasound - Esophageal ulcer - NED, 
Post-op appointment with Gyno/onco Dx of "Yes you have Cancer, we dont know where or what type so I am sending you to a GI Surgeon." <-- Starting to think he jumped the gun... 
Contrast CT - NED - 4cm right ovarian cyst,
Diagnostic Laparoscopy - Mesenteric fat lump removed - No results as yet, Peritoneal cytology - NEGATIVE - No malignant cells seen.
 

So now with all of the NED's and the Negative 2nd cytology, I am at a standstill and scared shirtless that the Dr's have initially given me a false positive or now I am likely to be given me a false negative when there really is something there. 

I know my Dr is the best bet for information, I know I can't be given a Dx but I just need advice on what to do now, what tests do I ask for... 

Thoughts??