I was diagnosis with a DVT my first pregnancy in the left leg had a surgery to remove it Could it come my third pregnancy?

YES! Get treated! You are at particularly high risk of a recurrent DVT. You should probably be treated to prevent clots. Your pre-natal provider will be able to address this, make sure to bring it up with them! Stay well hydrated, walk often, and wear compression stockings (not panty hose, get them at the drug store). You probably need to be on medication, check with your doctor!!