Should I test now or wait?

I have irregular periods. I got my last one on April 11. But for the first time ever it lasted wayyy longer then 7 days. It's lasted about 12 days. I followed the chart and had sex when ovulation was good. I've been having some symptoms these past two weeks. Nausea, pelvic pain, abdominal pain, sore back, fatigue, and major bloating. Plus my period was suppose to start a while ago for may, so I've missed this months. Can you have symptoms as early as 2-3 weeks after ovulation period? I don't know if maybe my heads playing with me or if I could actually be pregnant.