hello.... mine's low too..... not quite as low as yours, mine is about 90/40...... isn't meant to be anything to worry about, was at the docs last week..... just means if you stand up too quickly you could feel feint, or pass out, if you feel dizzy to get yourself close to the ground in case you do pass out.... you prob have low blood pressure normally, and pregnancy makes it even lower...

but if you are worried get it checked out.