I am so excited for you! I hope things go smoothly and you're pregnant soon.
OK, ttc. I've always been intrigued by the idea of liver cleansing and detoxing. Milk thistle and an intense regimine is possible, but since you're already trying you could substitute a simple fruit cleansing. I know a few tried it and felt much better afterwards; if nothing else, it gets you good and hydrated for HG! I'll try to find the old posts at HuGS; I know there are a few good links floating around there. Aside from that, a good prenate and 100 mg B6 is a super start. If you're worried about effects of any of the meds, you could test them out now to see if you've got any allergies or sensitivities.
That dr visit is absolutely crucial, especially since military care seems less-than-ideal in regards to proactive treatment of HG. Make sure you go in with a complete run-down of your first pg (prove the HG theory) and a protocol of anticipated treatments. Many doctors will give assurances that they'll treat aggressively and instructions to call right away, but "right away" turns into "first possible opening is in 3 weeks" and "aggressively" turns into "ginger and IVs as needed." We've seen the brush-off from doctors who seemed wonderful pre-pg time and again, so your best bet is to be thoroughly prepared and prepared to make demands. Is there a Plan B in case this doctor doesn't work out? From what we've heard, Japanese culture isn't too kind to HGers, and military supplies of anything beyond basics are iffy. Plan for as many contingencies as possible, and you'll save yourself trouble during the pregnancy.
Once you get that positive test, then kick into action. Unisom and Benedryl and increased B6 are good starting points; I can find you meclizine or Dramamine, too. Are you going to have an antiemetic on hand, or will you wait to see if it's necessary? If MIL was serious about coming to help out, then call her immediately and line that trip up. Be open with people around you and ask for help; I found it best to ask for specific tasks rather than leave it up to them and then have them do nothing because they didn't want to disturb me or didn't know where to start. Taking care of details concerning Kenzie and DH and the house and day-to-day life will make your life much easier, whether you're hit harder by HG this time or not. Start listing--everything you do in a day and a week, everything needed for groceries and supplies and clothing, etc. Then figure out what's necessary and what can be suspended if need be for a few weeks; figure out who you can ask to take care of necessary tasks. And let me know when you need me! I may be many time zones away, but it's just a quick phone call.
Good luck!