Botox injections into the jaw or masseter muscles, can for weeks later, make the jaw feel like its lost strength. This is a known side effect. Chewing hard foods may be difficult as the muscles used to bite down have been temporarily altered by the Botox injections. These injections to the masseter muscles give the desired jawline cosmetic result, but can at the same time affect biting down, chewing and cause the jaw to feel weak. This will subside on its own.
While all cosmetic procedures carry inherent risks and informed consent is required before undergoing injectables, Botox injection in the nasal tip to lift the tissue and correct the "droopy" appearance, is at little or no risk of causing blindness.
In my experience, "dimples" that appear on the forehead which are clearly the result of facial muscle movement can be well addressed with Botox injections. The amount used will depend on the surrounding skin and need for keeping balance of the muscle contractions. Your photo is difficult to judge, yet I would pursue an in person consultation with a dermatologist or plastic surgeon.
I agree, it looks as though the mole is recurring/not fully treated. I suggest seeing the doctor who performed the procedure for another evaluation.
I truly hope your vertigo is resolving. While Botox should not impact your vertigo specifically (I have not had any patients in which this was a cause and effect issue in my own practice), it is always best to seek any cosmetic procedure when your health is in top form. I do not recommend having Botox if you are suffering with an infection.Do get Botox again since you were so happy with it, but do so when you are feeling fully recovered and your doctors deem you so.