Also in the direction you’re going
Suboxone -> full agonist
You won’t feel withdrawal until you are withdrawaling from the fentanyl and suboxone themselves. Likely when the fentanyl wears off you will go into severe withdrawals from the drug itself.
Seperately come precipitated withdrawals. Which can happen when going from
Full agonist fent-> partial agonist buprenorphine
What you want to be careful of is when you start taking your suboxone again because you’re out of fentanyl. You’ll want to wait at least three days until you’re completely clear to take your normal suboxone dose. Even then you’d want to wait until five days due to fetanyls half life.
You might want to look something up called the Bernese method because it’s going to be about the only way that you get back on suboxone after having your fuck around with fent.
But you’re going to find out.
You’re going to find out about the kindling effect and precipitated withdrawal, and how opioids will still fuck your life up. Even if it’s just a tiny bit. Because everything has a start. Even if that start is just a tiny bit.
God luck and good speed
Be safe.