Hi LisyLee
Some blood pressure medication can make some people feel a little sleepy but it does not do this to everyone. Cut down on your salt intake and drink at least 2 litres of water a day. As Tali said you should tell your OB if you get headaches, but you should also watch for blurred vision, spots, zig zags in front of your eyes that last for more than 1 minute and pain under your ribs.