Low bp

I have to go twice a week to the ob because my baby is measuring really small for 32 weeks. I went today and she is perfect. Still small weighing in at 3.3lbs but the main concern was my blood pressure. You hear a lot more about preeclampsia and high blood pressure than you do hypotension. My bp was 88/50 today and they are starting to worry. The dr didn’t say anything but the nurse seemed really concerned. Has anyone else had this problem? What can I do to raise it a little bit?