My story went in the other direction. Once Catholic, now Protestant.
Mine too—funny how that works.
If you are a baptized Catholic -— then you will always be a baptized Catholic. The make of Baptism does not leave your soul.
You can return at any time.
Born into the Catholic Church - became agnostic for years then tried it and other religions and had my fill of them. Finally got what I needed (understanding of redemption through Christ) via non-denominational church.