YES
I have dealt with this. It is always better to know because I believe there is always something that one can do to improve the quality of life no matter the diagnoses.
My siblings refused to be tested for a genetic disease that they had a high probability of having, putting their live's in danger. I have one disease that can not be treated but I have a higher quality of life via my diet and lifestyle, and two other diseases that can be treated with medication and regular blood removals every 10 weeks since 1994, for the rest of my life.
I pray you are not facing something personaly. Please reach out to someone of you are. Don't face it alone.