F-1 student, out of status? I-130 approved?

I came to school here on F-1 and have been in school for the past three years. Last semester I was dropped out of one of my cles because I had already taken that in another school. This brought my credits to 11 and i couldn't register for any other cl because it was post-registration period. My international students advisor cancelled my I-20 because I was taking less than full course load and hence out of status. I wasn't aware of this until I tried to register for cles this semester. I've been petitioned and approved for I-130 . Due to this, my advisor will not help me reinstate as an F-1 because he says it'll be denied because the I-130 approval void my F-1 status based on dual intent. A hold on my registration has been removed and i've been allowed to enroll for cles this semster. Now what is my status now? Is there such a thing as "waiting status"? I spoke with another DSO in another school and they said I should be allowed to enroll whiles I wait on my priority date to be current. Is that correct? I've also contacted an immigration lawyer but she has no idea of how to help. SHe's blaming me for dropping a cl. I'm just worried that I might be served a deportation letter sooner or later.