Week 3… when is the turning point

So I’ve been on 50mg Sertraline for agoraphobia panic attacks and panic disorder for 3 weeks today. The first week and a half was dreadful. The heightened anxiety kicked me in the arse, everything was so much worse. The second week still wasn’t great but absolutely better than the first. I managed to run again every day but the anxiety was still there. But the last two days I feel so deflated. I just don’t want to do anything, I feel so spaced like I’m here but not here. Kinda like I’m losing my mind. I’m still singed off from work and pretty much housebound. The thought of going out snd leaving the house fills me with pure panic and dread. I wake up every morning hoping today is the day I feel better but instead I’m hit with anxiety the minute I open my peepers. Sometimes I think it may have increased my mood but then it’s made my anxiety worse so I’m not even sure if it’s working. I feel so sorry for my two children, it’s their half term and I can’t even do days out with them. I have my GP review tomorrow and I don’t even know what to say, the thought of increasing my dose and going back to none stop panic attacks is terrifying. I’m due back in work in a week and although they have been pretty understanding I’m not sure how they’ll take it if I need more time off. I have read it’s a long journey but I also have suspected ADHD so patience isn’t one of my strong points! Is there light at the end of the tunnel? Please, if you can relate to this and it got better tell me all.