Pregnancy Concerns

Im 18 weeks along and have had really bad headaches for weeks. I told my dr last week and she said drink a coke a day and try extra strength tylenol. On Sunday i experienced my eye sight become strange twice for only a few minutes at a time. I haven't felt my baby move in almost 2 days. I was waiting for my blood tests to come back but its been a week and still nothing. What do i do?