Hi, welcome to the forum, to find the responsible allergen is one of the challenges you need to pass through. You need to go for skin tests to identify the allergen.
Some measures which will be helpful to you are-
- Treatment of the outside of a house with pyrethroid (pyrithrin) chemicals prior to cold weather is one of the best measures.
- you need to close the windows of the car and home, stay indoors when possible, and use air conditioners and dehumidifiers to filter the air during times of peak symptoms. It will be particularly helpful, if you are allergic to mold or pollens.
- Showering before bed to remove allergens from hair and skin can help reduce contamination of the bedding.
- Water leaks should be fixed and swamp coolers should be cleaned periodically.
I hope this helped you. Take care and regards.
If you really want to pursue the cuase of your reactions, you can have skin pr ick testing done. This is very accurate for determining your allergens, but it is place specific (ie each city/region will have its own standard battery of allergens to test for).
The new furniture in your home could be off gassing many different things that are triggering your breathing problems.
Take care and feel better.