What is happening???

In the past two years, my life has been flipped upside down as a result of my parents splitting up. For a while I was depressed and I self harmed for a really long time until I went to therapy when one of my friends told my mom after she saw the cuts on my arm. I’m pretty much over it, and I’m really proud, but I can’t help but notice the anxiety I have now. For instance, yesterday I went to get a flu shot. Usually shots are something I don’t care about, I could even watch the needle go in and I thought it was so cool. But, when we got into the room and the nurse started prepping my arm, I started shaking and had to work really hard not to cry. Has any one else experienced this? Like their anxiety totally changing little things like this?