Say, "Hey [insert name]? Can I have your undivided attention for a sec?" Do not proceed until they are either looking at you or giving you sure signs that they're ready to listen.
I was diagnosed at 34. It was pretty much an entire year of a mixture of relief and disappointment that it took so long to get the care I needed to help me manage the symptoms. Glad you have your answer, finally! Now have fun getting yourself educated AF about it. You got this!