no. you should not take anything especially an antibiotic when you are pregnant unless it was specifically prescribed for you for this condition by your ob doctor. besides i don't know that is cause of your cysts nor did you disclose what kind of antibiotic you want to use. let you doctor treat this problem.
antibiotics safe to take for cysts during pregnancy. cysts are usually in the groin area very painful heated to the touch quite large when felt under the skin open suddenly and drain pus/sometimes clear or yellow liquid for days and have a sick odor. before and after busting open suddenly area is very sore and often return in the same spot or close.