Need to hear some reassurance:)

Hi, I was on 20mg lexapro for about 5 years when my anxiety started to come back with some accompanying depression. After trying a few different things that didn’t seem to work (waiting it out, buspar, etc) my doctor is switching me to zoloft. I’m gonna go up to 150mg zoloft but where I’m at right now is still the 20mg lexapro and 50mg zoloft. In a few days I’m gonna go down to 10MG lexapro and up to 100mg zoloft. I’m so nervous. I have noticed over the last week I am feeling a bit better in terms of both anxiety and depression but I’m so worried it’s just a fluke. I’m worried that the 20mg lexapro is still working and the zoloft isn’t gonna help. Idk. Need some reassurance that this thing really works. Or if anyone has a similar story I would so appreciate it, thanks guys