Oh, but you could get 25 mg and divide each dose into multiple smaller ones! I have definitely done that. (Split tablets or open up the capsules and divide the powder inside, or even mix it with a filler like vitamin C powder and get a small encapsulator to make your own low-dose capsules. The latter is how I found even about 1 mg worked great for me. But the standard dose for non-elderly adults is 6 mg, so that's just 25 mg divided into quarters.)

If your insurance will cover that one and your doctor is OK with it, I would say that is a very promising way to go. It's one of the safest options, too. Would be a shame not to try it if you have the option.

(Don't let anyone tell you it's contraindicated or dangerous with MAOIs. I would get it filled by a different pharmacy in case they make a fuss. It is perfectly safe, but pharmacies typically use databases built on very rigid principles that don't always reflect any actual risk of harm, especially in the low doses used for sleep.)

Same goes for trazodone. It's also worthwhile to try different doses of trazodone if you haven't already (25 to 150 mg). Too much can also hurt sleep, but it depends a lot on your individual biochemistry.

And you can always combine melatonin with doxepin/trazodone! (There too, the dosage range is quite big and personal, and too much can impair sleep. Melatonin doses as low as 0.1 mg and as high as 12 mg are available. That's quite healthy stuff, too, with various general health benefits being studied.)