Talk to your baby that you are going to visit him/her on the morning. And, ask for co-operative. =) Shouldn't be a problem.
My last visit, I was in my 11 weeks. Actually, my first time listen to Baby heartbeat was on my second trip, when I was 7 weeks plus.
As for the folic acid, you can continue taking. dont't waste it. Cos, I ask the nurse, I still have balance of folic acid, so she ask me to continue taking it, else it will be a waste.
I'm currently on Folic Acid (Leftover), Iron, Calcium and Fish Oil. Took all this in three separate timing a day, morning, afternoon and night.
Hope this helps. =)