Went to ent checked out my sores/lesions on tongue and told me it was irritated salivary glands and to eat yogurt and ill be fine. should i trust?

Good advice: Not every treatment that we recommend for patients works 100%, but there typically is a high percentage of patients who improve with treatment recommendations. There are some who get better even with no treatment at all. This recommendation sounds good. Try it for 2 weeks and see how you are doing. If it's not working go back to ENT and let him/her know. They can then try something different.

Yes: Yogurt has beneficial bacteria which eliminates other potentially harmful bacteria in your gut. These good bacteria may prevent candidiasis (yeast) infection from developing. If your condition does not improve after a few days, return to your ent.

Sores on tongue: It seems like a viable noninvasive option. You can also treat the symptoms by using a mouth rinse of milk of magnesia (magnesium hydroxide). If after the long weekend you still have the symptoms and they haven't gotten better, see an oral surgeon for a consult/diagnosis.