Re: low blood platelets?
Thrombocytopenia isn't unusual in pregnancy. Unless your doctor believes that other treatment is needed, just avoid injury and watch for bleeding. When you see your doctor, be sure to let him/her know if you have bleeding while you are brushing your teeth, if you are bruising more easily, if you have dark/tarry stools, if cuts take longer to clot than they usually do. Stuff like that. Avoid aspirin (which you probably are already).
If you are really worried, you could talk to youru doctor about increasing your intake of foods rich in Vitamin K. But, I would take care about doing so without his/her weighing in on the pros and cons of doing so.