Botox Recovery - Any Side Effects?

I had Botox for my forehead lines 3 days ago, and I’m noticing some bruising. Is this normal? Did anyone else have side effects after Botox? I’m also wondering how long it took for you to see the full results. I’m excited but a bit worried about the bruising—it’s not too bad, but I wasn’t expecting it. I’d love to hear about your experiences!