High blood pressure?

Sobs went to the Dr for pink eye on Thursday and my BP was 151/80. Throughout this entire 19 weeks of pregnancy my BP has been normal or even low. I checked it a couple times throughout the day today because of a headache that would not go away. My readings today were 137/70 and 143/73. Before I got pregnant I had high blood pressure pretty bad. 
What are my chances for pre-eclampsia?  This really freaks me out