As others have noted, you'll gain some length back for sure, so I hope you are feeling relieved by the reassurances from our awesome brethren.
You are nowhere near healed 2 weeks out, give it time and exercise
My surgeon was realistic and told me that it won't be exactly the same length.
I went from 6" to 5.5" after 3 months of healing. From there I think I got back to roughly 5.75".
I never had a vacuum tho so that 6" was a measurement hopped up on a lot of Viagra lol.
Upon my revision this last week, he was able to add longer rte as the space had stretched so I may be right around my original length.
For what it's worth, my initial implant and the revision were Coloplast Titans so not a 1:1 comparison to your AMS LGX.
Some extra thoughts...
I don't know your background or sex life, but I do know that women I am friends with, along with my girlfriend, constantly note that they don't need more than 4 inches to feel pleasure. It's us men who hyper fixate on it... The G-Spot is only 3" inside the vagina anyway and larger penises tend to feel uncomfortable or hurt most women....
So the old mantra of it's not the size of the ship, it's the motion of the ocean applies here
With that said, I'm confident(and I'm sure our brethren are as well) that you'll see higher numbers as you heal and cycle regularly.
Sending you positive thoughts and well wishes on your healing!