I'm in the same boat. TBF there is probably nothing else the dr can do. Some harsh advice here saying LTB, fair enough if r/ship problem in other areas but if we all threw out our snoring partners there would be a big housing shortage. Many women snore too, would you all tell their DHs to leave too, I don't think so.
We have exhausted (ha ha) all the options and nothing works to actually stop the snring. My DH is not overweight, doesn't drink and still it is unbelievably loud. we spent £600 on a custom made mouth device thing which doesn't work.
Try different earplugs, they are not all the same. Best ones imo are Boots like an aqua colour. Have you considered all the different sleeping locations in your house - one of you upstairs, one downstairs? Who cares what people think if there's a great big bed in the living room.
Or have you made sure that your current beds are as far away as possible from each other, not on adjoining walls etc. All helps. Also make sure rooms are as soundproofed as they can be, use draft excluders.
We had a stage where one of us went to a £29 Premier Inn once a week, was a brilliant investment.
Combine with all other measures for you for insomnia (no caffeine, lovely bedlinen, deep breathing techniques, have bath and milky drink, open window) Try Nytol 50g, I find they can help me drop off then I sleep through the night. See if you can persuade him to go to bed say an hour later than you to give you a chance to drop off.
Good luck.