I usually use prescription retin-a, which is not allowed during pregnancy. I used it a little bit, like twice a week, when my kid was older and still nursing (pediatrician and my doc gave me the okay), but I'm pretty sure you aren't supposed to.
If all goes according to plan I could be pregnant and/or nursing for the next 4-6 years 😳.

Is there anything without retinoids that actually works?

I feel like my forehead wrinkles have gotten dramatically worse in the past year or so.