I would absolutely go have another conversation with fitter & physio. There are different levels in bike fitters. The base level is someone who took a weekend course and that’s it. The better ones either have bio-mechanic training or are fully qualified physio-therapists.
You likely want to be working with someone on the better-end of things as you have some bio-mech issues that need addressing. They either need addressing on the bike or off the bike, but the bike fit SHOULD NOT be making those issues worse.
If you don’t think the fitter you saw is qualified to address your needs ask around.