"Gastro problems"

Struggling for months with digestive issues, severe heartburn and back pain. Doctor initially provided blood test which came back fine and said we could review in 2 to 3 months. The next day I rang 111 as the pain continued and was advised to take buscopan. A week later dealing with these pains I rang my GP surgery to be given an appointment in 3 days time with a nurse to feel my stomach. I have constant nausea and havent been able to eat for 3 days. They also requested a stool sample but I wasnt able to go. Passed from pillar to post, with no one taking me seriously - I now feel depressed, stuck and my arms and legs are tingling, I need to see someone.