You have to have valid visa para di maging unlawful ang stay. General rule.
This just my view, di ako immigration., if circumstances unavoidable, tpos di ka maka labas that's another story. Since di ka maka labas, kuha ka visa para legal stay mo. Pero pano kong di ka pede ma extend? Communicate mo kanila case mo, kasi hindi ikaw fault e so pede i waive nila yung no further stay dahil sa current situation. Make it all documented para may support ka just in case.