It is very common to experience changes in your menstrual cycle after a significant illness like COVID-19. The physical stress of the infection itself can temporarily disrupt your hormone levels, leading to a delayed period. Additionally, methylprednisolone (Medrol), which is a corticosteroid, is well-known to cause temporary menstrual irregularities, including missed periods. Other medications you took, like doxycycline, ivermectin, favipiravir, and multivitamins, are less likely to cause this directly, but the combination of illness and treatment can affect your cycle. Your body is likely still recovering, and your period should return to normal soon. If it remains absent for over three months, please consult your gynecologist.