Hi Kathleen
Sorry to hear you were feeling low yesterday. However it is very normal to feel like this if you have a virus whether or not on HRT! I most certainly do....
The other thing is the intolerable sensitivity to sound I always get just before a migraine and often that is when I know one is coming. I can't remember if you suffer from them? That sounds exactly how I feel - and then the headache comes - but I always feel low, lethargic and generally fuzzy, foggy tired etc during a migraine even if I get the headache sorted.
Other than that (having a virus, or migraine) I don't have low moods as such. I do feel rough when I haven't had a good night's sleep though! I'm sorry I can't help there but I do hope you are feeling better today - hopefully it is not hormonal....?
Take care.
Hurdity x