B6 + B12 before bed = restlessness?

Hey! So, I started taking a vitamin supplement some weeks ago to improve vividness and recall in my dreams. At first I took the pill at mid-afternoon, but I read somewhere in this forum that supplements (in general, vitamins as well) were best taken just before bed. I thought I would try and it worked very well on the first few nights, but this last week I've been feeling very tired despite having plenty of sleep. Today it occurred to me the supplement may be causing the problem, so I looked it up and I read on a website that vitamins B6 and B12 can cause you to wake up multiple times during the night without you noticing, resulting in restlessness, and that's why supplements are best taken in the morning or midday. Has any of you ever had this problem?