Urinary Incontinence Question

This is so odd and embarrassing to write, but here we go. I am a 37 year old woman, no kids. This year, I’ve wet the bed twice. Twice?! The first time it was so shocking but I had a huge cup of chamomile tea right before bed so I chalked it up to a fluke. Two nights ago, it happened again. Slightly less aggressive than the last time, I caught it quickly. But this time, I hadn’t had any liquids two hours before bed and used the restroom right before I got into bed. I’m now terrified it could happen again and just so confused on why/how this is happening? The only things I can imagine: I’ve been under an immense amount of stress lately. I started weight lifting very seriously in the last few years. As a child, I hated going pee and would hold it for as long as humanly possible and now I have a weak pelvic floor. Has this happened to anyone else that has not given birth? Help!

I have an appt with my gyno scheduled mid-July (it’s the soonest I could be seen).