It may be that you need to switch to a different neuromodulator. Two others that may be effective for you are Juveau and Xeomin. Though neuromodulators all work similarly, there are slight differences to each product that may give you the result that you are wanting.
Botox to the glabellar complex will definitely help solve the problem. What you have described ("very top of my nose, between my eyes is a crease that appears as if my forehead is slipping down, when I put on a tight headband it lifts and softens") is a symptom of an over active...
The prevalence of botox allergic reaction is now known. As there have not been reports of bonafide allergy to botox you may wish to see an allergist for testing to both albumin and botox. Keep in mind that testing for food allergens is difficult and may not relate to injectable protein of...