Struggling to cope with irrational fears..

I really thought I had my anxiety under control for the past few weeks, but all of a sudden my fear of having something wrong with me, and dying, has come back. It's making me feel nauseous and is really debilitating, I'm not sure I can go into uni tomorrow feeling like this.

I practiced some yoga and took my propranolol but I still can't get these thoughts out my mind. I'm booked to see a counsellor in about a month, but I need help sooner. Any advice? I can't really afford to be off because of this again.