Starting a new antidepressant

I recently started having anxiety attacks in the middle of the night that are very strong, I have been taking Ativan for over twenty years and also 20 mg. of Amitriptyline, an older antidepressants often used for pain. My anxiety is at its worst around 4 am. but lately the anxiety has gotten worse. I didn’t want to increase the Ativan so I started taking Lexapro, I’ve been on it for 4 days now. I feel so bad now with more anxiety, headaches and cramps in my legs and arms, I take 5 mg. but reduced it to 2.5 mg. I read that this drug can cause anxiety in the beginning and should go away after 1-2 weeks, I also had to increase the Ativan to help me cope with the anxiety from the Lexapro. I am not a good candidate for antidepressants and always avoided them but I’m trying to find another option instead of increasing the Ativan, I already feel defeated because I had to increase them anyway due to the Lexapro. I’m not sure what to do, I know it’s still early being 4 days but I’m fearful of increasing the Ativan. I would like to know if anyone else has taken Lexapro and how it affected you, should I persevere a while longer or look for another option, thank you.