I did a little research and yes, it can cause problems if you are pregnant or nursing. Best to stay away from aloe if you are expecting or nursing a baby.
The problem is primarily the leaf itself as it contains latex and is a laxative. That can be too harsh for you and baby and cause complications.
Please take care of yourself - if you are diabetic, just stick to a good diet until you can safely take meds.
Wishing you the best
I saw one place said it could cause miscarriages?
I might give you loose stools. But there are also benefits especially if you are Diabetic.
http://healthyeating.sfgate.com/health-risks-benefits-taking-aloe-vera-juice-internally-5017.html