Hey. Congratulations on 4.5 months sobriety and for the good health news. It's not so unusual to feel like this. "GREAT!! I didn't mess up my body with the drinking so I can go back to drinking again." I've felt that way in the past too. I'd feel so fearful that I really messed it up this time that I'd swear off drinking forever. Only to start drinking once I felt better again.
It's not so unusual and I'm glad that you recognized it for what it is and won't drink over it. No sense in that. Keep going.