Has anyone had hair loss from a drug that they didn't experience hair loss from before?

I've never had hair loss from anything before except for when I took Methotrexate almost a decade ago. I've recently noticed a lot of hair shedding, and I've been trying to figure out the cause, but so many meds can have a rare side effect of hair loss.

Has anyone had hair loss from a drug that they didn't experience hair loss from before? I think I have what's called telogen effluvium, which is basically when a much larger percentage of your hair goes into the resting phase and then falls out. It says that the cause usually happens between 2-4 months preceding the hair fall out, because it takes about that long for the hair in the resting phase to finally fall out.

I have been on Imuran and Entyvio for 3 years, but I recently had a flare and took Prednisone again about 3 months ago in addition to Voltaren gel for the associate arthritis. I'm wondering if it's possible that this time the prednisone could cause hair loss? Or maybe it's the combination of drugs?

Randomly, I'm also on Retin-A which I just upped my percentage right around the same time, and I've also read some people can have hair loss from that.

I'm just trying to pinpoint the cause to hopefully ease some anxiety and gain hope that eventually the hair shedding will slow down back to normal. I went to the doctor today and she's had me do some blood work, but she didn't really seem to have any strong opinion or thoughts of what was causing it.

Also, I know stress can cause hair loss, but I've been much more stressed physically and mentally in the past and have never experienced hair loss.