Mcat is 4-methylmethcathinone it is synthetic stimulant drug.
It was first used to make fertilizer, so having the name plant food.
It is having the property of addiction forming.
The general side effects noted are euphoria, increased alertness, dilated pupils, slurred speech, tachycardia
, inability to stop talking, loss of cognitive ability etc.
The effect on pregnancy
was not much studied. Better to avoid during pregnancy.
Now what can you do is,
Stop the drug,
Follow the growth of the baby with serial ultrasound
If any lethal abnormality detected go for termination.