TERRIBLE ache in leg and back overnight - low estrogen?

[Jng1]

I used to have this a lot before I went on HRT - an excruciatingly painful dull ache which felt like it was deep in the bones of my lower back, my buttocks and down my right leg. Not like a muscular or tendon pain - much deeper. And paracetamol /ibuprofen don't help at all.
GP thought it might be low estrogen related.

It disappeared when I went on HRT, but last night I had the most terrible bout again and was awake ALL NIGHT getting up and down, trying painkillers, stretching etc etc. All to no avail.

Had a hot bath this morning and now it's gone.
Weird thing is that the last time I had it this bad was when we on holiday in Turkey.
Just trying to figure out what brings it on?

• hot environment?
• dehydration?
• lack of caffeine (not been drinking hot drinks the last few days, and I'm sure I read somewhere that caffeine can stimulate estrogen production?)

?

That sounds like Sciatica...I get it when I have my period, it can be hormonal. I just take paracetamol as it's not as bad these days, it was much worse when I had a job that involved standing up for long periods of time

Sciatica is totally different to none pain, (even if the location is the same).
Have you had your Vit D3 levels checked? A long term deficiency can cause severe bone pain, mine (same place) improved with a prescribed high dose.