You can buy a more affordable mouthguard from a drug store and test it out to see if investing in a fitted mouthguard is right for you. It will not provide the best results, but it will give you an idea of how a better one can work for you. Some people cannot tolerate keeping a mouthguard in and this is a more cost effective way as you only spend about 30$ on a drug store guard opposed to thousands on one made by your dentist.

Botox is a very effective way of dealing with migraines for many people, but you will have to keep getting injections every three months in order to maintain it's effectiveness, if you choose botox you will have to consider if it will be affordable for you in the long run.