Just had bad allergic reaction to cat dander. Nose clogged. Sneezing a lot. Got asthma. Took rescue inhaler, Advair and benadryl. What more can I do?

Try a nose spray. I would try a steroid nose spray. Also you can try a nasal rinse to wash out the allergen. You could try a cromyln nasal spray too but that takes longer to work.