Imo, and others i’ve spoken with, cbg works better for migraines than cbd or thc. If you do use cbd or thc, Make sure you get plenty of water. Try the oils from Lazarus naturals or hoku seed company.
The farm bill allows thc testing to occur 30 days pre harvest - when many cannabinoids have not yet formed (they all begin as cbg and become cbda, thca, etc. during later growth) and showing it to be labeled hemp. Post-harvest testing is only for delta 9 thc which is what thca become when heated, but thca is not limited. You can search for high THCA products but be careful because there are lots of scammers. I can dm you some good vendors. This is kind of a short version. If you’d like to know more, just search for info on the 2018 farm bill or Rod Kight, a well-known cannabis lawyer. People sometimes call it a loophole, but it’s obviously intentional. I love that this bill was written by people who wanted it legal and then Trump signed it (knowing or not knowing?). One more thing - big canna is apparently just as bad as big pharma and has begun fighting against hemp farmers/vendors.
I believe decriminalization means it’s illegal to purchase but when you’re caught with small amounts you face a fine instead of jail time. I’m talking about fully legal, order it online from reputable farms or vendors, and USPS delivers it to your door. I live in Texas and i get an ounce delivered every month on subscription.