Having just lived through someone elses AD withdrawal, the complaints were about feeling dizzy/fuzzy/drunk/tired/snappy/irritable. There's not much crossover with pregnancy symptoms. Dizzy/snappy would be the most likely to cross over, but there's a difference between low blood pressure in early pregnancy that actually makes you black out, vs just feeling weird. Snappy/irritable is the same as PMS.

Not fun to live with, and lasts a few weeks.