Don't panic - spotting is very normal. I doubt the Oestrogel is making you feel down. I think you are very anxious - which is a typical meno symptom. You are probably still producing some of your own oestrogen which could cause some spikes in hormone levels - this can cause a bit of spotting as well. I did get some PMT type symptoms with the Mirena. Though the Mirena is supposed to bring fewer side affects, it can sometimes bring some of the nasty side affects which progesterone brings for most of us - those typical feelings we got before our period e.g. bloating, mood swings, headaches etc.
Break through spotting and bleeding is very normal for the first few months of starting HRT and with the Mirena there may well be some spotting occasionally at any time. I used to find that when I started a new canister of Oestrogel I felt as though I was getting slightly more oestrogen and sometimes got a bit of break through bleeding and mood swings alongside. As time goes on your own hormones will subside and things will stabilise. The beauty of Oestrogel is that you can increase the amount you use if you feel you need it e.g. you find the flushes and night sweats emerge again, which would be a sign your own hormones have dropped. If your meno symptoms are under control then stick with one pump per day - this is very low dose and could stay ideal for quite some time.
Oestrogen is the goodie - many of us wish we could just take oestrogen as it makes you feel good. DG xxx