Definitely don’t do that. That spreads the backlog problem to every card in your deck, making everything worse.
You can’t “return to exactly the same state where [you were] seventy days ago” because you don’t have a time machine [do you? 
]. As you said, your memories have continued to decay and there’s no virtue in keeping the cards in the same order you would have studied them in if you’d studied them in the last couple months.
A better path forward is to get your overdue cards out of the way so you can resume current studying while you also dig your way out of the backlog. I use a catch-up deck like this – Adressing Backlog - #2 by Danika_Dakika – and it works great.