Cost benefits of getting a dietitian?

I was officially diagnosed 11 days ago, but I stopped eating gluten three weeks ago when I had my scope.

Sidebar: I haven’t spoken to my gastro yet, all I got was a note in my mychart that the biopsy was positive and an appointment for next Tuesday.

I’m pescatarian , now celiac, and also in the middle of a half marathon training program. I am SO TIRED. Genuinely 7pm hits and my eyes can’t stay open and I’m sleeping 9-10 hours a night (I usually sleep about 5-6).

Im really worried I’m under-eating, but I’m nervous about accidentally eating gluten and hurting so much that I’ve been sticking to whole foods like rice, tofu, tuna, yogurt, fruits and veggies.

Did anyone else get a dietitian when they were first diagnosed? Did that referral come from your doctor or did you seek someone out yourself? Was it worth it?

*United States based