I'm still in peri, I've been on a high dose patch but wasn't really absorbing it. I added a pump of estrogen about 6 weeks ago now and felt surprisingly awful.
For the first couple of weeks I had physical symptoms - bit of nausea, sore boobs, bit bloated, mild headaches. But I also almost instantly had massive fatigue, irritability and super brain-fog. This took longer to shift than the physical stuff - about 3/4 weeks in the end I think.
I have periods though, so I'd started the extra pump on day 1, and I think it was my period coming which banished the last of the symptoms, clean slate.
It really surprised me how much it affected me because I've been increasing the patches for a couple of years without all that - but then I wasn't absorbing them anyway, so it makes sense.
I think it's just settling-down symptoms, everything was a bit in-flux.
I'm glad I stuck with it - I can actually sleep until my alarm for the first time in 4 years - miraculous!
It wasn't the full 6-weeks. I'm 6 weeks out from starting now and have been feeling better for about 3 weeks I think.
Have you had any positive symptoms? The improved sleep was what made me stick at it.