My blood pressure has always been on the low end of normal. For most of this pregnancy, everytime my OB has checked it it's been 110/60. He also said that my haemoglobin is on the low side.

For the last few weeks I've been having occassional moments of lightheadedness/exhaustion that come in waves. Sometimes they pass in a matter of seconds buts sometimes they're quite overwhelming and I need to sit down for a few minutes until they pass, but not so severe that I feel like I'm going to faint or anything. I haven't really mentioned them to my OB because they haven't been that regular. But for the last week or so I've been getting quite a few a day (I've also had two bouts of gastro which can't help).

So, I've borrowed my Dad's blood pressure monitor so that I can check my BP when I have one of these spells and see if that's what causing it. This morning I've had a couple of spells (quick passing ones) and checked my blood pressure. I've gotten 92/48 and 103/52 which seems extremely low.

So, do you know anything about low blood pressure in pregnancy? Is there anything I can do to prevent it? I'm a bit worried because DH is going away for 5 days later this week and I'm going to be on my own with DS...