TBH if you can afford it, it's worth the money seeing a good private menopause consultant, as many NHS meno clinics are staffed by GPs and not necessarily consultants.
What kind of symptoms have you got now?
There are a few options that come to mind that you may not have had suggested.
The first is that at 46, you are still young for post menopause, (you had an early menopause at 43.)
Some drs would favour the oral contraceptive pill Qlaira over HRT for younger women as it's higher in hormones.
Second, sometimes conti HRT gives more side effects as you get 2 hormones daily, and the progestogen part can cause low mood etc.
There is no medical reason why you can't use sequi HRT (though you would get a withdrawal bleed every 4 weeks.)
Thirdly, some of us find natural progesterone better than the synthetic progestogens which are in all other forms of HRT. The brand is Utrogestan and you could take it either as a conti type of sequi.
You could also think about having a Mirena coil and a separate form of estrogen.
Any of these might suit you better and it's a case of suck it and see.
Lastly, are you doing the right things with lifestyle? It's really important to appreciate that HRT can't do it all- daily exercise, at least 30 mins fast walking, a healthy diet with masses of fruit, veg, pulses, nuts, olive oil ( the Mediteranean diet) helps and few refined carbs.
You need to nurture your guts!
To answer the last point- no, symptoms do not go with the last period. Many women only start to have symptoms once periods stop.
This was the case with me- periods stopped around 52-53 and I went onto HRT around that time. I have used HRT for many years now and hope to carry on almost indefinitely as I feel well on it.