Hey everybody!

I have a question for those who have done the surgery or are knowledgable about it.
First off, this is how I currently sound in my female register:
http://vocaroo.com/i/s0QbbKdhnvuOIgnore the question I brought up in the voice clip. It is a clip from a few weeks back and I have since decided that I am definitely getting the surgery. Reason being I would love to sound authentic in my voice without feeling like I'm forcefully increasing my pitch, and also to abolish any chances of accidentally reverting back to my male register (which happens a lot when I'm drunk with friends, etc.).
My question is, considering I have a naturally high-sounding pre-op voice, my post-op voice should still see an increase in frequency, right? As in there shouldn't be a "ceiling" for me considering I
was born male and have the vocal folds of a male? I'm scared the surgery will somehow ruin my ability to speak in the register I have already attained, and that my post-op voice will end up lower than my pre-op. Is that possible? Do people with high pitched pre-op voices generally end up with higher pitched post-op voices?
I know the surgery isn't a magic cure, as people have mentioned here, and that one would still need to practice her voice. I feel as though I've always talked similar to females growing up, and have been ma'amed on the phone even before I realized I was trans. I'm just kind of hoping the surgery will make me sound genuinely female.
Second: I'm very self-conscious about my laugh. Will the surgery feminize it?
Thanks girls!