Did you have pneumonia, bronchitis or asthma with it? If so, the difficulty breathing can last up to 3 months. Are you on an asthma rescue inhaler or nebulizer? It does help. I had Covid in 2022 (the worst!) & then again last year 2023 (Milder) and I was diagnosed with long Covid the first of 2023. I still have thick mucosy saliva in the back of my throat from the first time I had it. No doctor can give me anything to relieve it. I have tried it all and seen everyone from primary, dentist, ENT, Infectious Disease & Dermatologist. The Dermatologist cultured my mouth and it came back normal mouth bacteria. She told me to use Listerine, brushing, flossing, etc., I still have it. I will say that eating a very salty food or anything with sugar makes it worse. I was going to consider the above mentioned Mucostop, but, it has too many ingredients for this sensitive body. Salt water rinses, lemon ginger tea help, but, its temporary. If I find an answer for the thick mucus in back of throat/mouth I will let you know. Praying for you right now. Rest and do a little something. Rest....You may find that any type of exertion brings on the difficult breathing. If it continues, I woud see a Pulmonologist ASAP. I'm so sorry you are battling this. It's not easy. Please keep me posted. I understand and I care.