What happened to Victor the day after he completed his creation?

Victor Frankenstein becomes very ill the day after he completed his creation.

Do not ask me," cried I, putting my hands before my eyes, for I thought I saw the dreaded spectre glide into the room; "HE can tell. Oh, save me! Save me!" I imagined that the monster seized me; I struggled furiously and fell down in a fit.

Poor Clerval! What must have been his feelings? A meeting, which he anticipated with such joy, so strangely turned to bitterness. But I was not the witness of his grief, for I was lifeless and did not recover my senses for a long, long time.

This was the commencement of a nervous fever which confined me for several months. During all that time Henry was my only nurse.