Unfortunately, this is a known complication. Botox typically wears off after 3 months at which time everything should return to normal. There are eyedrops that will improve the droop. Ask you doctor about these drops.
Typically botox wears off in 3-4 months while fillers can remain for approximately 1 year. Therefore, I would doubt that this was caused by Botox. Injections of filler into the chin is relatively innocuous. It is difficult to state what is causing your asymmetrical smile. Did you have the asymmetrical smile 2 weeks after the botox/filler injections or did it come sometime later? Without a 1 on 1 consultation, it would be difficult to offer an opinion from static photographs. Congratulations on your pregnancy. Best of luck.
It appears that you have lost volume to your supporting structures. In my opinion, a product called Sculptra would work best restoring volume. Around your eyes you might need a different product. If there is anything that has cut down on my face lift procedures it has been Sculptra. It has been around for many years, and in my hands seems to work better that some of the other products out there and is equivalent or less in price. Unfortunately, with any fillers the results are temporary.
All depends upon what you want to accomplish. The first sentence is revealing: You want a solution for your overbite! You will not be able to correct your overbite without orthognathic surgery. You do not have jowls nor saggy cheeks. Your facial proportions are consistent with someone who has a short lower face deficiency with overbite. Granted face lift is an invasive procedure and at your age would be ill advised. If one advances your mandible and maxilla you will have a much better "neck angle" and this would also improve your nasal-labial creases, help with your overbite and restore the lower 1/3rd of your face. With all due respect to my colleagues, you do not have microgenia (small chin) which would best be treated with a chin implant. I suspect that placing a chin implant will accentuate your chin further and not restore proper facial proportions. I would consider a work-up with a orthognathic surgeon. I see this quite commonly in my practice where my patients are trying to accomplish goals and take short cuts. There are no short cuts in medicine! Best of luck.
I'm not exactly sure what you mean by abdominal wall endometriosis. Is the endometriosis inside the abdominal cavity or is it outside of the abdominal cavity (on the skin, on the muscle or on the subcutaneous region). I have seen both and have operated on women who have had endometriosis. If it is superficial to the abdominal cavity - an abdominoplasty might actually help, especially if it in the area to be excised. If it located intra-abdominally, I would suggest asking your gynecologist and find out how best to control the endometriosis, with medications, and if you would be a candidate for abdominoplasty. Best of luck.