There’s also another piece of this that’s totally missing.
When you come into the Church, during the process of RCIA and all that, the Church maintains that you’re doing the best that you can, and you shouldn’t worry about your sins yet, since you cannot receive the sacraments. During this period, a person is on the way in and doing the best they can and God honors that. So no sleepless nights over sins until you can go to confession.
I think what you have, in returning to the Church, is very much like that. I think that you ought to do the best you can to return and take everything in the proper order, which is the order you are given by the Church.
What you basically did was go AWOL for some time–the length of which I don’t know–and of course, you have to go through a process to come back, assuming you intend to stay back. This is entirely reasonable, I think.