I Have An Ipod

I have an iPod touch (5th generation). Yesterday, it started to shut of by itself, then it would turn back on. It did this a few times in a row. The first time, it even signed me out of iMessage. It also has an issue that started yesterday (when it manages to stay on) where it goes off and on wifi over and over (it's not a router issue because my phone is fine). It seriously just happened out of nowhere, it's not like I dropped it, then the issues began. I reset it, that didn't help. I restored it and that didn't help either. It does have periods where it works fine, I just really need it. It's less than a year old. I want to try and resolve it on my own. My sister actually bought it for me and I don't want to bother her to help me with it. I'm wondering if anyone has any suggestions on how to fix it or what I should do? Thank you!
Update: Never mind. I figured it out! It involves me asking my sister to take me to the Apple Store, but it can just be repaired!