Do I have a rare blood type?

I used to donate platelets fairly often. I’d always request a Red Cross donor card but would never receive it. After probably the tenth time I donated, I finally received the card but it was without a blood type. I called to find out why that would happen and after being pushed off to several different people, I found out that every time I donated, it was being incinerated because they couldn’t identify the blood type. I’ve since gone for other tests which lead to the results saying “inconclusive-molecular testing required” but it isn’t something covered by insurance without an actual need besides my own curiosity. Just wondering if I may have a rare blood type or if there’s some other reason my blood type might be so difficult to identify…