Given the symptoms you report (having something in the throat in the morning that makes it difficult to breathe for a few minutes,) you might have experienced a laryngeal spasm or perhaps some mucus got stuck in the larynx for short time. A sore throat can provoke that type of incident. Therefore, you can start treating the sore throat with local antiseptics. Antibiotics could be also required. You can visit your primary health provider to follow up and for diagnostic tests.