30mg of Citalopram isn’t an overdose, a lot of people are prescribed that amount or more. It’s likely still the anxiety and a bit of a high on the increase. That being said, OD is not something you should ever do. It’s distressing and usually extremely painful and long. Take what you are prescribed, stay consistent with your meds! It can’t help you if you are erratic with it. I hope you get better soon.