I'm sorry that this is causing you so much stress and that you're worried you made a mistake in getting the surgery. If it helps, from what you're describing it sounds like you did do your due diligence before making your decision; you asked the consultation team for their opinion, and you asked about what to expect after the surgery and about potential side effects. And while doctors are only human, and sometimes make mistakes or have biases, there's no reason to assume yours lied to you about the recommended treatment. So, if there do turn out to complications down the line, it won't be because you rushed into things.
Something else that may help is to focus less on the potential side effects and more on how your body is actually doing during the recovery. You can't address things that have not, and may never, happen to you, but if you notice side effects of parts of the recovery process that worry you (like a sudden increase in pain, fever, things like that), then you can contact your healthcare provider and talk about how to manage them. Too, the kindest thing you can do for yourself right now is to take a break from reading about side effects or alternatives to the surgery, since it's sending you into serious panic. How about taking at least two days to not read any of that and to focus on other things?