Here are supplements I take:
Vitamin K (as others have mentioned above). I used to take 45mcg Vitamin K2 with my calcium, but have increased the form and dose based on this article, and others that I've read: https://betterbones.com/bone-health-basics/vitamin-k2-mk7-vs-mk4/
I'm sorry Vit K is upsetting your stomach. Maybe if you take it with food it would help.

I found two K2 MK7 supplements on Amazon and ordered both. Not sure which one I'll stick with, I'm alternating them now. One is Sports Research Vitamin K2 MK7 180mcg with Coconut Oil. It sources its K2 as Menaquinone-7 (MK7) from fermented chickpeas rather than from MenaQ7, which is a specific branded form. This is a gel capsule with liquid contents.

The other supplement is from True Vantage and contains 180mcg of that vitamin as "MenaQ7".
 I read that "MenaQ7" supplements are considered superior because "they contain a highly purified form of vitamin K2 as MK-7, which has been clinically validated for its benefits in supporting bone and cardiovascular health. Their production process ensures a high concentration of the bioactive all-trans form, making them more effective than other vitamin K2 supplements." This is in a capsule form with powdered contents. The TrueVantage brand that I ordered with MenaQ7 is made in the U.S. and 3rd party tested.

Collagen as Fortibone: I take a daily powdered collagen supplement that contains Fortibone, which has been shown in studies to help bones. The cheapest brand I found on Amazon is AlgaeCal brand. It's cheaper if you buy two or three at a time. I make a smoothie with it along with some juice, banana, and other fruit.

Protein powder: Protein is important for your bones and I take a supplement since I probably don't get enough in my diet. I found one that tastes lime foamy lemonade. It's Oath Clear Protein and I prefer the lemonade flavor.

Prunes: Studies have shown that eating 6 prunes a day can help bones.

Magnesium is also important, so I take 300mg of magnesium glycinate/day.

Of course, I also take calcium, vitamin D, as well as C, B complex and fish oil capsules.

Exercise: I try and walk every day and am just starting an excercise program by Dr Lisa Moore, a PT who specializes in osteoporosis. Her videos are free on YouTube. She has a Facebook group page called Brick House Bones.