Seeking advice/support

Hi, I’m 18f diagnosed with depressive-anxious disorder and ADHD. I’m currently taking Lexapro 15 mg and Atomoxetine 60mg. Around the fifth month on this medication, I felt incredibly well — better than I’ve ever felt before. It was almost like I could do anything. For example, I even downloaded a dating app and started texting multiple people, which is very unusual for me. However, after about two weeks of feeling great, I fell back into a depressive state where nothing seems to have meaning. I feel empty, unmotivated, everything is so dull and I’m struggling with self-harm thoughts (although I’m doing my best not to act on them). I’ve struggled with depression and anxiety/paranoia since I was 8 and sometimes had “hyperactive” outbursts, but they usually last only a two days at most. I also tend to have rage outburts and intensive emotions/mood swings. Lately, I’ve found this subreddit, and I suspect I might have bipolar type 2 — but I really don’t want to self-diagnose. I just feel so lost and I’m trying hard to find answers. I’ve already contacted my psychiatrist, and he told me to increase my dose of Lexapro (( from 10mg to 15mg, currently on day three), and we’ll see how that goes. But honestly, I’m finding it really hard to wait and see if it will help.