Recently (and also now as I'm typing) I'm experiencing strange symptoms: continuous sighs and a light sensation of incapability of breathing properly, I feel my heart beating in my chest, very light dizziness. I've always suffered from anxiety, but those symptoms came only related to a specific situation and together with intrusive negative thoughs (and in those occasions, I also experienced shivers, like I had a fever). But now it's weird because they come without intrusive thoughts, it's like they are not caused by my mind. 

I initially thought it was because of either coffee (I drink a cup with milk in the morning and that's it, no more coffee for the day) or lack of sleep/bad sleep (or also hot temperatures, idk). But I'm worrying a bit because I don't know why they actually came up. 

I must admit yesterday (and the whole week) was a really stressful day at work, full of frustration, anxiety and nervousness, so maybe it could be a release of those sensations. But the first time it happened, there was really no reason.

I've told my therapist too and she said to take a day to relax and see what happens. Now I'm heading to the gym, because I know phisical efforts makes my mind relax and distract from those feelings.