It is now too late to affect your decision, but for the sake of completeness I’ll answer.
I believe that Fr Serpa’s advice was that yes, you should receive communion in this circumstance, and without compunction. In other words, trust you are in a state of grace.
See the end of the first question which he answered.
… I probably won’t be recieving Communion until I figure this out…
And his answer…
Worry not! You are not held responsible for a priest’s error in past Confessions.
My conjecture on this is to mention the old maxim that God works through the sacraments, but is not limited by them. I would say that you are in a state of grace, however there is still a judicial requirement to have those sins absolved through the Church, which can be done at your next confession. (as others have said). When this happened in my case, the second priest accepted the need for the sins to be absolved, but without need for reconfession.