Numbness in fingers after doing reverse plank

[Kberry]

Hi, I am new to this forum and I look forward to hearing from everyone. I am a 52 year old female and in good shape. I spent the last year at LA Boxing and I really enjoyed it. I have since quit that (got too expensive), and I am now doing Jillian Michael's Body Revolution. The dvd I am currently doing contains the reverse plank. When I do this, my fingers become numb and stay that way for about 2 days. I don't know if I have carpal tunnel syndrome (cts) or not, I have never been tested. But if I do have cts, would the reverse plank do this to my fingers? I have never had this numbness feeling until I did the reverse plank. I am worried. Thank you for listening