Overlapping side effects: Multiple Sclerosis and COVID

I really want to be vaccinated but I need more information. I have been injecting 30 mcg interferon to treat Multiple Sclerosis. Some of the side effects are heart issues and liver problems. It appears that all Covid-19 vaccines pose risks of cardiac infarction and cerebrovascular accident. So here are my questions. Are these sets of side effects cumulate ? Are the vaccine side effects more likely in patients who have MS ? Have any studies been done that include MS patients ? Have any studies been done that include people who inject interferon ? If those studies have been done, how can the public access the data ? If those studies have not been done, are any planned ? I have been in isolation since the pandemic started 18 months ago and I live alone. I only leave my house to pick up groceries curbside and I wear double masks when I do so. In late September of 2020, I contracted Covid-19 from an a symptomatic electrician who came to my home to do some work. Neither he nor I wore masks because our interaction only lasted long enough for me to write a check to pay for his work. 10 days later, I woke in the middle of the night with a fever of 103° with nausea, diarrhea, and an inability to maintain balance. Nearly a year later, I still have fatigue, shortness of breath, and reduced senses of taste and smell. I really don’t want to go through that experience again. But I don’t want to die from a heart attack either. I’m not seeking medical advice per se. I am seeking answers to the questions I posed so I can make my own decision. My neurologist said he doesn’t have enough information. My pharmacist said the same thing. The sources I have consulted so far include CDC, WHO, Yale University, and now MAYO CLINIC. Thank you for your help !