Again, thanks for all your replies.
The anxiety and shaking episodes can be be troublesome. They can indeed start unexpectedly. Sometimes it can happen several tines in a day, it can last one day or more. It's unpredictable and inconsistrnt. Sometimes I think it doesn't make sense at all. Also, at times it can be accompanied with dizziness, a blocked nose and ear. I sometimes feels like I have the flu as it also drains my energy. My sleeping patterns vary. I would say I sleep fairly well except that on some nights, I will start feeling warm in the upper body and face at around 1am and I have to take my top off. Obviously, it wakes me up but I go back to sleep straight away.
I had some a meno/thyroid combo blood test back in January this year. My oestrogen level was 586 pmol and thyroid was ok. With the 586 pmol oestradiol, it suggested that I had entered the menopause but I haven't had a period for 15 months now, which mus tput me in postmeno category. I am going to do another thyroid test but a full one this time to make sure nothing has been missed and that the anxiety/shaking episodes are, indeed, meno-related.