Discrimination because of ADHD and # of Children?

I am currently 32 weeks pg. I was laid of yesterday 6/28/05. It was stated that there was a lay-off in many departments and I was chosen as I had no completed training. I have ADHD and my previous boss at the company had issues with me completing the training at work, even though it was company mandated. I was working it as fast as I could, with a 2 hour roundtrip commute, no support from management, a 6 month period where I asked to not be required to complete anything while I dealt with my youngest son's health issues. I was granted the 6 months.

I was never given an end date to complete this training. I was asked to give a time frame to complete it and granted time to complete it at work and work my job, I estimated I could have it complete before I went on maternity leave. The department I am in has/had 6 employees, one who is out on STD with the same job title as mine.

I had a conversation with my manager about a week ago as I feared that something like this was going to happen and he assured me no one was out to fire me or lay me off. I am no going to lose my benefits in 1 day, other then paying for Cobra, and have gotten a small severance.

I feel besides the training which I was never given a due date for, the reason I was let go is because I would be the anly employee in this department with 3 small children, on of which has 3 chronic illinesses.

So with that background, did they have a right to lay me off as not performing, when I was given no due date for completing this training? The only thing I want is for them to cover my benefits until 6 weeks PP and pay for my children's benefits.

Would any of this be covered under the ADA?