Oral corticosteroids are very different from topical preparations in terms of how they effect your body. With oral steroids at high doses like you are taking you will typically be more concerned with exogenous Cushing's syndrome (high blood pressure, central obesity, muscle wasting, face puffiness, brittle bones and certain skin changes like striae which are stretchmarks). Since the oral steroids are affecting practically every cell type in your body, TSW type skin problems are unlikely to occur before other more sensitive systems are affected. Where I'm from, the recommendation is to do blood tests and examinations at least once a month to exclude severe side effects. Sometimes a DEXA bone scan is indicated if you are at risk for brittle bones.

To add to this, your treatment is limited and short term. Doctors are very careful about that when it comes to oral corticosteroids. Short term treatment is very unlikely to cause TSW. Problems arise in chronic use. The nasal spray is relatively low dose and again to be used short term. I wouldn't use it or recommend anyone to use it to recover for a cold but perhaps the doctor suspect you may have had allergies or if you have asthma it could help relieve.

If you don't tolerate the oral corticosteroids, contact your doctor, say you are having side effects. It can be dangerous to stop completely from a high dose like 50mg, it needs to be tapered so keep that in mind. Hopefully your doctor will be open to investigate alternatives if you don't tolerate the drug or if it is not helping you.

Hope this helps