Increase my dosage?

I’ve been on 30mg for a while now. However, It’s not working for me how it before while being at work which requires lots of critical thinking and time being at my desk. It feels like I take nothing. Also, I don’t seek out for the medication to feel any euphoric feelings either. I talk to my doctor about it and she prescribed me 5mg of dex IR to take as needed. Which is okay sometimes But the thought taking more pills triggers anxiety for me lately. Any suggestions will be much appreciated.