As long as you can see PR you are NOT banned (yet?), fair chance to come back. Most people think after the recent PR update "it's over now" but it is not! There are for sure more changes to come and to vanish from the Google index (and the serps) for a while is nothing unusual, so be patient.
If I search for "mubinahmed" on google, www.mubinahmed.com ranks #1. Do you still experience the problem or did it solve itself? All my sites dropped about 40 results in the SERPs yesterday. So I'm hoping this is just temporary.
Only 6 pages indexed does look like a penalty. You sure you are not selling any links? (Asbestos anyone)
No penalty, to what I can see everything is ok, I have seen this happen to many sites over the years. If you are sure that you have done nothing causing penalities or banning, the site will come back - it's coming back actually.