Difficulty swallowing after Xeomin in the jaw/neck

I recently had injections in my lower jaw line and down my neck to 'give a gentle lift' to my jaw line. I hate the feeling immensely. I cannot open my mouth all the way and at the end of the day I feel a lump in my throat. I can swallow but it feels more difficult. I've tried stretching my jaw open several times a day which helps a little but I also end up with a mild headache at the end of the day. Any suggestions on how to remedy this?