Anger and frustration

Let me put you in scene. Im almost in my 10th day of Nofap, my girlfriend is in a long trip, I started to fix my sleeping schedule and started to meditate everyday, with the help of a meditation app, but often I feel sudden anger, and feel very frustrated about small things. It seems to me that everything is trying to frustrate me, I couldnt open any of my old money accounts, neither create one, and when I tried to send money to invest I lose it all because of a system failure, I wake up to eat breakfast and after I cut the bread in many pieces I realize there is not enough butter, mosquitoes bothered me all night and couldnt sleep, and I don't know, I feel REALLY frustrated, even moments after meditating.
I started thinking im really really bad at meditation, because immediatly after I feel "good" but then a few minutes later everything is shit and I start insulting and feeling frustrated. Meditation advices are accepted. Cab anger be sexual energy repressed? What exercises do you recommend me?

 

Hope someone can give advice, I feel there isnt so much activity in this forum.
Anyway I went out and ran a lot, like really pushed it till I couldnt run anymore, and I feel exhausted but much better right now. Exercise really helps,

 

This actually helped me a lot! I even us it in the street when random thoughs come to me, and maybe its a placebo effect or distraction, but it definitely helps me overcome thoughts. Thank you!

 

Great advice, i'll try it. Thank you!!