Intro and help with HRT weight gain. Advice needed!

Hi,

brief intro...I am Louise and am 43 yo. I have an 11 year old son and work full time. Have been on this site on and off over the past couple of years.
My issue is I have finally been diagnosed with peri-menopause. Was suffering really badly with lack of sleep and incredibly bad mood swings. So when I finally got HRT (Evorel Sequi) I though this would be the answer to my prayers.

I am a pretty regular gym goer (3 times a week) and do both cardio and weights. I also walk the dog daily and have a brisk 10 minute walk to and from work.

So, the major issue is, I have literally put 5lbs on in a week and a half!!! What the? Honestly, my food intake hasnt changed and neither has my gym habit. Does anyone have any advice for me? I am going back to see my GP in a month and will of course raise it then.
On top of this my boobs are swollen to a ridiculous size....and nothing fits me anymore!!!

Appreciate any advice you have.

Thanks