I got my wisdom teeth removed and collapsed a day later. is there a connection?

Dehydration,: Low blood sugar - because of decreased intake, narcotic analgesics can make you light-headed, postural hypotension too - are among a few possibilities. Let your oral and maxillofacial surgeon know right away.

Low on hydration: Wisdom teeth removal will limit the amount of fluids and nutritional intake mainly due to pain on moving your jaw. You will feel fatigue and weakness. Sometimes the effects of medications, pain medication or anesthesia medications, can also have a lingering effect. Best thing is to rest, take fluids & food on a consistent time schedule. If not better in a day or two, talk to the surgeon.