Don't run it anymore . Do a stand alone cpmpression leak down test at each cylinder if equipment is available.
Drain
oil/coolant and carefull inspect intake gasket first.
My Felpro 1262 somehow got all twisted up, leaked and caused the same symptoms.
You may get away easier than expected as I had the same exact head gasket expectations but the leak down test held up just fine. The moment the intake was lifted the Felpro was so distorted it looked like a mask from a Scream horror movie. Felpro has been having that problem lately but don't know why.
Once completed I'd run the motor for a heat cycle with light 5W-30
oil , change the
oil & filter again. Hey...things happen. Hopefully yours will be simple as was mine.