Pleased to hear that you are getting ahead of your illness. But more importantly, nice work listening to your body. Too much too soon will often end you up going backwards. Please do ease back into your workouts. Scale back to a 30 -40 minute swim workout as you are able and build from there (adding back in 10 minutes each swim workout) until you are back to where you need to be. Use this same strategy for folding back in the bike and run too. Intensity and running should be the last to transition back to since they take more for your body to recover from.