Sore Joints Esp. Hands

[Slewelf]

I'm on Day 8 of my second round of Whole30 and my joints have been super achy, slightly, swollen, and stiff. I feel it all over but especially in my fingers and knees. Aside from removing the non-compliant foods and adding more animal proteins (I only eat fish, chicken, and eggs) and vegetables, nothing else has changed in my routine. I'm 26, very active, train horses professionally, workout 5-6 days per week... I don't feel like I should have sore, achy joints, especially not my fingers. It's worse when waking up in the morning but the achy feeling continues all day. It does feel inflammation related but I feel like by this point I should be seeing less inflammation not more and new issues? 

Food diary for today which is a typical day:

B: frittata with spinach, 1/2 cup blueberries, and 2T almond butter (also a cup of coffee with a splash of nutpods)

Preworkout: Hard boiled egg and small handful of almonds

L: sautéed veggies, kale, grilled chicken breast, 1/2 avocado

D: Salmon, mashed potatoes, green salad with olive oil and vinegar dressing

I also drink about 100oz or more of water each day.

 

Any idea what might be causing this? I haven't introduced any new foods so I don't think it's an intolerance to the stuff I'm eating but I guess that would be possible.