Madonna‘s determination to make sure her upcoming tour is on point may have contributed to her health scare, sources tell People.

As previously reported, last week, Madonna was hospitalized with a “serious bacterial infection,” forcing her to push back the launch date of her Celebration Tour. Now, a music source tells People that the Queen of Pop had “ignored some symptoms of illness for quite a while because she thought they would go away.”

“She didn’t want to take time away from rehearsals,” the source adds. “She was rundown and not feeling 100 percent for a while in anticipation of her tour. She is relentless in her quest to be the best, to wow her fans and to do what others before her have not done.”

A second source tells People, “Madonna has been very busy for a long time and not taking care of herself. She just continues to push herself beyond the limit.”

Page Six reported last week that Madonna had been “putting in 12-hour days” while rehearsing for the tour.

The pop icon is now out of the ICU and recovering. The Celebration Tour, an overview of her 40-year career, was originally set to launch July 15 in Vancouver.

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