Focus on doing well in your science classes. Your sGPA and only to a minor extent, your cGPA are what's holding you back. Pulling off a 3.75 in your masters will open up a lot more doors. Some might disagree, but I don't think the lack of research is going to hold you back either. Even with your stats tho, you should've gotten at least a couple interviews this cycle if you applied broadly enough...what schools were on you list? Also, you might want to think about tuning up your PS. It could help swing things in your way.