I would wait 2 weeks before adding botox after the initial injection, as it can take up to that long to see the full effects of the botox. Usually 20-30 units is sufficient in the glabella but in a man with strong muscles (or woman), more may be needed. However, you have had A LOT of botox added into that area. If you cannot move those muscles, the wrinkle there is a wrinkle at rest and will not be fully corrected with the botox (which works better for the dynamic wrinkles which are more evident during movement). Some injectors will (carefully) do a little filler in this area to help with the #11 lines if they are still present after botox but this area can be difficult to obtain perfect results with fillers as well (depending on how deep the wrinkle is). Some people do develop antibodies to botox and botox is not effective. If you are getting that many units and still able to move those muscles, I would wonder about antibodies, I would also question the injector as to why he/ she has continued to add more units without waiting the full 2 weeks to see the initial results.
I have never heard of or seen any reports of dysport or botox having systemic side effects when used for cosmetic purposes when done appropriately (with the products which have been FDA approved for these purposes).
I have seen success with a series of chemical peels (superficial to medium depth peels) for acne, mild acne scaring and pore size. There is usually some improvement with one peel but often doing a series of peels with about a month in between will give the best results. With darker and more olive skin, more caution is taken due to the risk of hyperpigmentation but a peel like the Vitilize peel can be done with this skin type. For deeper scaring, you would likely see better results with a laser that is better with resurfacing. I would also recommend being on a retinoid for the symptoms you described.
There is no evidence on the safety of botox or fillers in pregnant women and there is no way to safely study this in pregnant women due to the potential risks. Of course, there have been women who get treated with a neurotoxin or filler when they do not know they are pregnant, and there are no adverse reactions. Most experienced injectors will tell you that it is unlikely to cause any adverse reaction and that lIkely, neither are absorbed at high enough levels to have an adverse effect. HOWEVER, due to the potential risk and unknown safety, I do not know anyone who would comfortably do a cosmetic procedure on a pregnant (or even breastfeeding) patient. It is just not worth the risk. I read one report of a patient who received dysport during her first trimester and the baby was born blind and deaf (in Australia). Was this the dysport? Unlikely, but there is no way at that point... I wouldn't recommend taking a risk.
Botox used to treat the glabella and forehead lines should be safe to do and should not affect your paralyzed vocal cord. The Botox affects the muscles locally in the areas treated if used appropriately for cosmetic results.
