Really bad burning spot on my scalp. Could it be a ringworm?

Yes. Could be ringworm or a host of other inflammatory skin diseases that affect the scalp such as eczema, psoriasis, seborrheic dermatitis. Need to see your doctor for proper diagnosis and treatment. There are otc antifungals you can use while waiting to see your doctor such as lotrimin solution, Nizoral (ketoconazole) shampoo.