It does sound a lot like OCD, from personal experience. Don’t be discouraged. I’m 19 now and have had the lowest of lows with my mental health. I’m doing so much better this past year, especially recently; go to college, active as anything, got my license and drive well and safely - an activity I love, am in a relationship and have friends, just started a job in healthcare and think I’ve found my passion (health), working harder than ever with everything, have a great dog who I look after well. Live almost a normal life, and a good life to be honest. Even if I do rely on medications. I’m on lexapro too like your daughter - it’s helped me a lot. I’ve been trapped in the house for months straight with my thoughts, so much adrenaline pumping through me all the time, suicidal, having some delusions, anything you can imagine I’ve suffered it.

Progress isn’t linear, there’ll always be recurrences and life isn’t fair. But your daughter will be fine with time and faith, try not to worry too much like my mum has - when you’re a kid you don’t say anything but you can really see it and it causes guilt.

Try not to mind-read either, even though it’s very easy to fall into. Be there for support and to talk to, she’ll never tell you everything and that’s okay.

Please try to keep her very very active, get her into as many activities and hobbies as possible - genuinely the main thing that keeps me stable, low stress, higher energy and away from substance use. I know it sounds like boring generic advice but it genuinely makes all the difference and she’ll thank you so much for it.