Hi I Guess Am Pregnant As I Missed My Periods.

Hi
i guess am pregnant as i missed my periods.
this is hopefully my third pregnancy.
dint do test so far!!!
its around 40days since my last date of period.
no morning sickness i feel
sometimes i feel tired
although my first two pregnancy were extremely troublesome especially during my first trimester.
i was taking vitamin b12tables as well as caltrate 600plus d tables since last two months for the reason i was breast feeding my 14months child as well as i felt the need to take it coz i use to fast in ramzan.

My question is
1)i took more dan 5mg folic acid in a day
(Two tablets)only two days
will it cause any problem

2)shud i continue b12 tablets.
3)is my baby safe !!am worried coz i dont feel any nausea