Is it normal if ive been masturbating since elementary school?

Im a girl and yeah I was masturbating and I didn't even know it. The way I looked at then was a stress reliever and guess what? I learned recently that yeah sex or any other sexual activities can help you release frustration or stress and I was like nooooo wonderrrrrrrrrrrr lol. I still do it to release stress, it helps me so much. Sometimes when Im in a situation where I can't do it and Im so irritated, I panic and find some way. Ive done it in some crazy, desperate moments like I couldn't take it, I had to release all my frustration. More recent, my bf irritates the fuck out of me so while hes sleeping I'll just go to the bathroom and start masturbating.