I just blew my highest PFTS in 11 years

You giys have seen my posts about being sick, 4 days ago I was admitted to the hospital coughing blood streaks, 02 dropping to 89% and blood gas at 34% I’ve been on antibiotics for four days, one I haven’t been on since children’s and this morning I woke up feeling better, we did PFTs and I just blew an 88%. I cannot believe it. That turn around in 4 days, literally a miracle.