For 8 months my tongue has been sore, burns @ tip and sides. Dentist said due to tongue tie, clip june & tongue still swollen. 3 pm more discomfort?

Dry Mouth possibly. Dry mouth is one thing that can lead to a swollen, sensitive tongue. Dry mouth can be caused by many different medications and/or medical condition's including sjogren's syndrome. This syndrome mostly effects woman post-menopausal women. Ask you dentist or md to look into these possibilities.
Tongue lesions. Tongue tie does not give you tongue lesions. See an ENT to have these lesions evaluated and possibly biopsied. Feel better!