Hi Kay21, I totally sympathise with how you must be feeling. I have health anxiety too and it only takes for me to read a negative comment about some health issue to unsettle decisions I had already made. But I don't think you will ever find 100% positive reviews about anything. And I too thought how would I feel if I then got cancer - would it 'serve me right' so to speak? I thought about whether to take HRT for a long time before I took the plunge. I read plenty especially on this website and decided that for me the positives outweighed any possible albeit unlikely risks. You are right, so much research and so many benefits. I also thought that I could minimise my risks by eating well, exercising and maintaining a healthy weight.
I think it's worth bearing in mind that it can take a good few weeks, maybe months to get exactly the right mix that suits you and you might feel worse before it gets better. There are many really helpful women on here that know far more than me about it. Four weeks in and I feel that I am starting to feel a definite improvement. The hot flushes disappeared relatively quickly but am now starting to have more energy and sleeping better too.
Maybe there comes a point that when once you have reached a decision it might be best to stop googling for a while and see how you get on without outside influences. I remember that chapter in Three Men in A Boat where the main guy comes across a medical dictionary and convinces himself he is suffering from absolutely everything - apart from dodgy knees!!
Best of luck to you, let us know what you decide.