Negative Proteins S Activity

Diana
Hello ladies 
I was placed on Lovenox 1week ago, I was called yesterday by surprise from another office for an ultrasound which got me of guard, well then today my OB called and told me my bloodwork came back with Negative protein S Activity and I need to continue my Lovenox and I should have a high risk OB call me since she set up the appt for me. Well now I'm a little more worried more than anything, the last thing I want is to lose my twins