What can i do in short term to help health anxiety as the symptoms of it are getting worse as the anxiety is for example i've started getting stomach pain and irregular heartbeats when anxious and this makes even more worried?

Your body is talking to you. Listen and take good notes. Then go to uptodate.com and pay to read all about anxiety, causes and treatment. It can be treated and maybe even stopped if cause is found. Then discuss with your Dr.

It is not feasible to provide an opinion without additional history; physical examination may be some tests. It would be prudent to see your doctor to see if you may be depressed. Depression is treatable. Counter-intuitive as it may seem, exercise may help. Start with low intensity exercise such as walking and gradually increase the intensity as tolerated. Drink more water. Wish you good health!