I am currently 6 to 7 weeks pregnant... I train dogs with mild behavioral problems and obedience problems... is it safe to continue working?

Yes. However, with "behavioral and obedience" issues you may need to be more aware of bites and them getting infected. I will assume all dogs are current on shots?

Yes all are current on shots and since I work at a major pet company we do not take aggressive dogs... but jumping and knocking into me is a frequent occurrence...

I should have put I have some medical issues too like Thyroid issues and Diabetic (I manage them all and doing well but I am considered high risk... )

It shouldn't be an issue, but I would try to avoid situations where trauma to your abdomen could occur. A significant hit could cause an miscarriage. Not dissimilar to "Falling down the stairs."