Frequent UTIs

I have had 5 UTIs in 2021 and 2 already for January. Going to see my urologist in 9 days for a cystoscopy. Am 78 years old female - normally in good health - work out 30 minutes 5 days a week - mainly only health issues are insomnia sometimes and my lower back goes out once in a while. I am searching for information from people here that have had frequent UTIs. What did they find out what causes this and if anyone had a cystoscopy and how did that work. Also, interested in learning about medications and side effects for these problems and learn something before I see my urologist. I wish everyone happiness in their life. Thank you for listening.