Do I have an infection

Chest mucas for last 7 days but no cough
Blocked nose last two day
Chest is somewhat wheezy last 7 days
Fatigue and tiredness
Weak bladder
Need for constant wee and regular accidents

If the mucus is clear probably there is no infection but if the mucus is green or yellow it indicate infection. See doctor for proper diagnosis. Here are few tips that can be helpful:

Drink lots of water can help thin the mucus that has thickened and gotten stuck in your lungs. Stay away from products that will dehydrate you, like alcohol or caffeinated drinks.

Try steam inhalation. Steam can help moisturize your airways and loosen the dried mucus. Taking a hot shower will also work.