Just read root canals can cause heart disease and cancer, i've had a few done should i be worried and what do i do going forward?

Bad info: What are you reading, unfounded rumor monthly? No, eliminating infection by doing root canal treatment makes you healthier. Not treating the infection can allow the infection to spread to other organ systems. Please see your dentist to assure that you are in optimum dental health, and good for you having root canal treatment!

Get the facts: Sadly, there is a lot of misinformation readily available on the internet in addition to good information. There is a dental specialty devoted to this topic, endodontics. Start with their website https://www.Aae.Org/ and beware of the difference between association (people with root canals that have had other health problems) and causation (people who believe root canals are the cause).