Any igg positive test suggests that it was previously their and now you have immunity against that.... Igm positive test is thing to worry... In your condition it is not.... About thyroid condition diagnose what type of it because many times it is autoimmune which can give rise to abortion due to autoimmunity.... Also main thing of hormonal balance..... Also chromosomal or genetic problems....

A proper healthy pregnancy needs the four healthy components i.e. A healthy uterus Proper menstrual cycle Healthy matured ovum A proper nourishing system. Any abortion/ miscarriage leads to disturb the uterine health. So it is always adviced that the one got abortion should follow the traditional things designed for a delivered women. If failed so will lead to disturbed uterine health as well as its nourishment.