I always worry about flipping and having an insulin reaction on the water (even though I've not had one in over 10 years as a type I diabetic)

I've never had a problem keeping my boat pointy-end up for the most part. I did have a freak wind gust auto-gybe me and death-roll me going downwind once, but I should have been doing the wild thing anyways and it wouldn't have mattered.

Live and learn.

Make sure your mast is sealed and you CAN right the boat. If it happens (and you aren't racing) just relax, take your time, once you get it up, just put her in irons for a bit while you collect your thoughts (and your breath). Reverse the rudders, travel in a bit and blast off once again.

The trick is having the confidence in your ability to right the thing. That way when it happens, you don't go into a panic.