Advice!?!

Hey ladies. Third pregnancy here. First two pregnancies were cut short. I had my first son at 35 weeks. Second son born at 36 weeks 4 days. Both due to high blood pressure. I don't have high blood pressure when I'm not pregnant. So any advice as to what I can do differently this time? Both of my previous births were in the summer and this one is not so I am hoping that may help a little. Any other advice? Anybody had this problem!?! My goal is to at least make it to 38 weeks!