Spiraling Upping Dose

I really need reassurance. I just went up to 10mg 3 days ago and I’m so worried this isn’t going to work for me. I took 5mg for about 3 months before it felt like I was just slowly going back to step one. Now my brain is stuck saying “this isn’t the drug for me. This isn’t working and going up in dose won’t help because Lexapro stopped working at 5mg.” I’ve had some GI issues and increased anxiety during this increase but nothing out of the ordinary. I’m just a little upset I think that 5mg basically disappeared in my body. I feel guilt and fear all over again and it’s the worst. I can’t bring myself to do things I enjoy and I genuinely fear being bored or relaxing after a day at work.