So there's a couple of good suggestions here that I'd look into...

Talk to you doc about switching meds to something that will continue to help you with the anxiety and depression, but may also help you with the quitting smokling. Remember that not everyone reacts the same way to a medication, so what works for someone else may not work for you.

Quitting smoking is definitely one of the best things you can do for yourself and your body. If you're worried about weight gain, consider joining a support group/weight loss program like Weight Watchers or a gym that specializies in helping women become more fit (in my area we have a chain of workout places that cater only to women).

A support group (whether online or in real life) can also be helpful for more than just the weight loss too. You might consider helping yourself to one for the smoking as well. Studies have shown that in combination with one of the stop-quitting treatments (like the patch), a support group can double the chances you will stay a non-smoker.

Most of all, though, do it when you are ready. While it's fine to take an initiative to please others sometimes, this is something you have to be 100% behind and willing to do whatever it takes to make it stick. If you don't have that resolve to start with or are doing it for someone else, you're not as likely to be as successful as if you're doing it for yourself.

Good luick!!
DocJohn