Go Back after Drop Out?

I went to a prestigious university where I was considered as an international student.

I faced some issues that I couldn't control, and, as a consequence, caused me a lot of stress.

My mind was satured, and I consequently couldn't make any mental effort: I knew I was not going to do well in the upcoming exams.

I decided to drop out after I revealed some of the (academic) issues I was facing. They encouraged to stay, but I had this perpetual headache.

They took new measures indeed, but it was too late for me, back then.

Recently, the university contacted me and asked me if I would like to join the academic program again.

What should I do?