Can this downward heavy feeling between my eyebrows be corrected by more Botox, or some Restylane? Or do I have to wait it out?

I suggest speaking to a well trained cosmetic dermatologist, there are options such as fillers, but sometimes Thermi is best for a more long term cure.  Best, Dr. Emer.

Neurotoxins in the forehead will paralyze the frontalis muscle which is the muscle we use to raise our eyebrows.  This will cause the heavyness you are experiencing as well as the "fatter" appearance.  More xeomin will make it worse.  let it wear off

I would go back to your physician at 14 days and let him or her examine you.  I would consider waiting it out.  Next time you have your injections, remind your physician about this so the technique can be tweaked a little.

Thank you for your question.  At 9 days your Xeomin should be in full force and you should love your result.  It is possible, if this is the first time you have had your forehead treated, that it may take time to "get used to the feeling".  However, if your brows are too low you may be able to get some lift by treating the orbicularis muscle under the eyebrows and get a little lift (or at least less depression).  In any event, if you are not thrilled with the treatment it is important that you see your injector so they can correct the result if possible, or at least see you concern to prevent it in the future.  Good luck.