Hello. If I come straight to the point, I get a lot of stress when trying to concentrate. I believe this is because of the stressful relationship I had for a year. 

I usually enjoy working, studying, etc. and while I was in a relationship we argued a lot with my gf on Whatsapp and I had to check if there were any messages from her and I couldn't focus properly. While trying to do work she always wanted to fight and that drove me insane. It's been 4 months since I broke up with her but that feeling of anxiety hasn't gone away. Every time I try to read a book, study or do anything that requires me to pay attention my body turns on the fight or flight mode and I get so stressed I can't function properly. It's making life a lot harder for me. Does this ever go away ? I haven't witnessed anything like this in anyone so like all human beings, I should be able to focus. Do therapy or antidepressants work? I just want to go back to my normal life.