6dys late

Rebecca • I`m 35yrs old, I have a 14yr old son.
Ok I was due for AF on 6/8/17 it is now 6/14/17. I have very irregular periods normally 35dys. When should I test? My breast are semi sore, I'm extremely tired, my stomach is poked out, I pee alot, I get headaches and I have a big appetite. Anyone can help?