I think I’ve just started my period is it normal to yo be like light pink/ red this is my third month on the pill and all my other periods haven’t been like this is it normal

Yes.

You don’t have periods when using birth control. It’s either breakthrough bleeding during active pills or a withdrawal bleed during your break due to withdrawal symptoms. Both of these bleeds are synthetic. They’re not a period. You don’t ovulate when you use your pills correctly, that’s what is preventing pregnancy from occurring.