I take b6 and b12 and pregnancy multi. I believe it helped me regulate my cycles a bit.
With the b6, you need to take it with other B vits to help with absorption, so that is why I take it with the pregnancy multi. But it can take a few months for it to work with your body (as all supplements can).

B6 can also help with morning sickness, so it is safe to take while pregnant too. But there are warnings for extended use of b6, so I stopped taking the extra dose at 12 weeks pregnant.

Good luck whit your TTC!!!