M.,
I am sorry to hear that your worries are ramped up at the moment. It is normal to have some apprehension when starting a new Rx, so you are not alone in this challenge. However, due to the fact that you do not remember any issues when you were previously taking it...and the fact that your genesight type test indicated it as being a good match for you...I think you can be safely optimistic about
your Prozac start up!
Also, remember that for every negative report that you read...there are many more neutral and positive ones that never get written. It is human nature to recount a negative experience, but those that were helped or satisfied are off living their lives, not so much writing reviews. ;) IOW, try to stay away from those types of postst, and stay positive that this will work for YOU.
Worries such as fear of losing one's mind are extremely common, and just a manifestation of your heightened anxiety at this time.
After a couple of weeks of adjustment and coming up to level...you will be feeling much better!
Use your coping skills and keep us updated, so we can keep you in support!
S.C.