Apparently I have Telogen Effluvium. My hair isn't thick anymore. I was prescribed Clobetasol. Is this a good option?

In my opinion, you should be evaluated by a hair expert. Telogen effluvium is treated based upon the etiology . Some possible etiologies are thyroid, iron deficiency, fever, surgery, medical illness, vitamin D deficiency, vitamin A deficiency, zinc deficiency, copper or selenium deficiency, essential fatty acid deficiency and mental stress. Treatment is the removal of the cause. Topical minoxidil is the main stay of treatment. Some report platelet rich plasma to be helpful. Hope this helps. Good luck.

This is a complex condition that has many causes. You need to be evaluated for the various causes first by a doctor who specializes in this condition. IF there is a cause, then the cause should be addressed and a blind treatment with a steroid may not be in your best interest. 

The first thing to do is to see a hair restoration specialist to find the cause for your hair loss. Once the cause is established the best treatment options can be recommended.