Brows really heavy after Botox along the eyebrow lines (upper/glabella) - only been 2 days!! Giving me a headache and nauseated!

My initial condition was heavy brows making me feel tired, and that I would often frown when concentrating causing tension headaches, so I asked for a bit of a brow lift. She injected about 20 units along the top of and between my eyebrows. Within a day I could already feel a tightening. It's day 2 now, and my eyebrows feel like they're being pushed downwards (even more) and it's like I have a band over my brow. I'm worried this is going to worsen - is this normal? Will they eventually lift?