You could try a small dose of 5-HTP. 50 mgs to start, then maybe 100 mgs if 50 does not help. If you can't find 50 mgs, then start with 100. The easiest way to tell you are taking too much 5-HTP is you will sweat easily.

You do not want to take Sumatriptan and 5-HTP at the same time. Nor St John's Wort and Sumatriptan or 5-HTP.

I suggest staying away from St John's Wort. Too many variables.

Are you taking a good dose of B-12 ? 1000 to 2500 mcgs ?

If you stop breathing during the night, that cause cause headaches, fatigue and many other symptoms.