How Long Should Rovamycin For Toxoplasma Be Taken?

hi my name is sara , i am 24 years old , heights 160cm , and weight 50kg. i had abortion from one years ago and the causes was i had toxoplasma . i started taking Rovamycin and the last time i did the blood test the result was igg=90 and igm=2.74.my question is how long i have to take this medicine and when i stop it ?.. is this medicine harm my chance to be pregnant or not and what the normal range for igg and igm? ... thank you