Hello!

I want to add to Eileen's excellent advice by giving you the links to some previous questions on this topic with member answers. 

Here is a similar question about pregnancy and Adderall and some member responses.

And here is yet another question and answer on this topic from our site which produced quite a number of responses and is still going strong.  As you can tell, the discussion became rather heated with a diversity of opinions.

But here is information from the official Adderall site which you might want to read: 

"Pregnancy: Pregnancy Category C. Amphetamine, in the enantiomer ratio
present in ADDERALL® (d- to l- ratio of 3:1), had no apparent effects on
embryofetal morphological development or survival when orally administered
to pregnant rats and rabbits throughout the period of organogenesis at doses
of up to 6 and 16 mg/kg/day, respectively. These doses are approximately 1.5
and 8 times, respectively, the maximum recommended human dose of 30
mg/day [child] on a mg/m2 body surface area basis. Fetal malformations and
death have been reported in mice following parenteral administration of
d-amphetamine doses of 50 mg/kg/day (approximately 6 times that of a
human dose of 30 mg/day [child] on a mg/m2 basis) or greater to pregnant
animals. Administration of these doses was also associated with severe
maternal toxicity.

A number of studies in rodents indicate that prenatal or early postnatal
exposure to amphetamine (d- or d,l-), at doses similar to those used
clinically, can result in long-term neurochemical and behavioral alterations.
Reported behavioral effects include learning and memory deficits, altered
locomotor activity, and changes in sexual function.

There are no adequate and well-controlled studies in pregnant women. There
has been one report of severe congenital bony deformity, tracheo-esophageal
fistula, and anal atresia (vater association) in a baby born to a woman who
took dextroamphetamine sulfate with lovastatin during the first trimester of
pregnancy. Amphetamines should be used during pregnancy only if the
potential benefit justifies the potential risk to the fetus.

Nonteratogenic Effects: Infants born to mothers dependent on amphetamines
have an increased risk of premature delivery and low birth weight. Also, these
infants may experience symptoms of withdrawal as demonstrated by
dysphoria, including agitation, and significant lassitude.

Usage in Nursing Mothers: Amphetamines are excreted in human milk.
Mothers taking amphetamines should be advised to refrain from nursing."

The bold is mine.  It seems this is definitely a decision you need to make with your doctor's guidance. 

I hope this helps some.  I know this is not an easy decision to make.