Sertraline is used to treat depression so would normally be used in the middle of a depression crisis - and I think the dosage increase, from what other members have said, seems to be within the norm. Of course, if that’s a concern for you, it’s probably an idea to see your doctor again to review it.

I have absolutely no factual basis to say this but , if you’re in Europe, perhaps it’s worse this year because the weather has been very sunny and hot for a lengthy period of time?