Is Breastfeeding After Taking Mifeprinon For Abortion Safe?

i took 3 tab of mifeprinon 30 sept 2011 to avoid my 3rd pregnancy.till now bleeding hasnt started..am not at allfeeling well,very drowsy,nausea,vomiting,backpain,tiredness and chest pain and severe gastro problems..i just cant feed my second baby who is just 1 yr..are thse side effects of the same? is it harmful for my nursing baby? kindly advise!am 31 yr old mom to two..