Yes.
Let me tell you that after i had my first panic attack about 3 months ago, I had no idea what was wrong with me.
I was getting one after another severe panic attack and I did not know what panic disorder was.
For a month I did not go to the doctor, and in that time i truely believed that i had, in this order: hepatitis, multiple sclerosis, hyperthyroidism, cerebrial palsy, something else,, diabetes, and a busted blood vessel in my brain.
Oh yes and I also thought that I was getting schizophrenia and i went into a panic attack for 3 days. Funny now, but NOT a joke!!!!
I was a hypochondriac after my frst panic attack, but its a lot more under control now and I know what i really have so Im not so much of a hypo anymore.. I never was before all this either..
You are not alone.