My sense is that you're looking for is input and information. So, here are some thoughts/angles for you.
I'd make a little mark on my calendar about when it started. I'd also keep a tablet and note when it happens and when it doesn't and just keep an eye on it for a few days. You might also note what the weather was like and your level of activity and if you ate certain foods (gluten, dairy, supplements). You'd be amazed at what you can catch when you put something on paper patterns show up.
I completely respect your desire to not go to a doc. If it persists, it might be helpful to get a doc's input just to rule out anything serious. You can even tell the doc that you're there to rule out anything serious and that if it is something less serious you'll treat it with diet and exercise (or whatever feels right for you). Don't throw the baby out with the bathwater.
Wish you the best,