No - you have to come off the pill for a while for the hormone tests. They aren't that reliable anyway, and you may find your periods come back eventually any way.
I stayed on coc until 49. I experienced headaches during the week off due to oestrogen withdrawal (prevented by drinking all the time - water that is 
). My period got lighter (wayhay!!). My skin got drier (used more moisturiser). My privates got itchy and my pubes moulted 
. I think sleep started being an issue too but for some reason they always say that isn't menopause 
Night sweats were a huge big massive problem.
I got ordered off at 49 because their computer check list with the nurse suddenly asked if you had migraines. I was hauled before a doctor, who did recommend mirena. At the time, I had my fingers in my ears (metaphorically speaking, I am not that rude!) and there was no way anyone was going to stick on of those up my foof! If that was what I wanted, I would have done it years ago . I ended up on pop which I gave up on shortly after as it did not agree with me (no problems with it previously)
I was sure that after 5 years of these symptoms, my periods had finished. Sadly, this was not so. They came back after 5 months and because I was not ovulating, they were frequent and unpredictable and gradually got heavier. The mirena option is no longer available - the GP who fitted them retired and the FPC does not fit them for meno, so I would have to go to a gynae and have tests first.
It is definitely worth considering. Mirena gives you the progestogen part of hrt which protects the womb. It gives it in the required place and the dose circulating in your blood would be far lower that if you used normal hrt, or progestogen only pills.
It provides contraception 'just in case' which is really useful at this time.
You can use oestrogen with it to help with meno symptoms - patches or gel are better - you use less of it because it does not have to go through your liver first, like tablets. You can use this continuously, so do not have to go off it for a bleed like coc, or hrt tablets.
I read a lot of bad stories about mirena - but it seems to suit people better if they are trying to avoid heavy periods and use it for hrt though. If you have bleeding problems on it, like constant spotting, this can be stopped by upping the oestrogen (see Dr Annie Evans on You tube).