BLUF: Your health/mental health is the most important focus. It's nice to have job security, health care, and pay on the 1st & 15th, but it is meaningless if you are overwhelmed with anxiety. Therapy can help anxiety without meds or in conjunction with them. An "automatic med-board" is rare. A med board usually takes 6-12 months to complete, during which time you continue to go to work. Talk to your PCM and/or mental health. Start with chaplains/military one source/ MFLC if you want to see if that helps first. Sorry for wall of text.
Most med boards are tied to your ability to deploy/world-wide qualified status. The medical guidance is pretty focused on timelines of medication use when it comes to anxiety. You are usually prescribed an antidepressant that can impact overall levels of anxiety (depression and anxiety are impacted by the same neurotransmitters targeted by antidepressants) and a Benzodiazepine as a quick-acting rescue med for panic attacks. Antidepressants almost never impact your ability to deploy so minimal worries there. You can be on a Benzodiazepine for a limited time to allow adjustment to stressors causing anxiety while waiting for antidepressant to work at full capacity (4-6 weeks-ish). After about 3 months of regular benzodiazepine use your PCM will get you off that med (stay on antidepressant) or will have to give you a waiver to deploy. If you go to deployed locations with a pharmacy you might get the waiver and deploy like normal but it depends. Most PCMs will require you to see mental health before prescribing Benzodiazepines, which means your mental health provider will be involved in the deployment waiver process as well to confirm you are mentally fit to deploy. Almost any psychotropic medication will put you on a 90-day mobility profile to make sure you stabilize. If you are in the bucket to deploy in the next 90 days and start a new antidepressant or Benzodiazepine, you will probably not deploy until next time. If you miss more than one deployment due to meds/mental health, you will be looked at for possible med board but not necessarily boarded out, just reviewed for work performance and overall stability. Most people on benzodiazepines take 5-10 pills per month. If the antidepressant is doing it's job after 6 weeks, the benzodiazepine use should drop to 0 or maybe 1-2 a month due to lowered anxiety levels. If you are seen regularly in mental health for more than a year, you will be reviewed to see if you are getting better or have a chronic issue that will continue to impact your ability to deploy-another opportunity for a med board.
This is not medical or mental health advice. Talk to your PCM and/or mental health for the info specific to your base/mission. PRP and weapons-bearing jobs change most of what I said above.