Confused...

So I have been pregnant before but don't exactly remember everything. And most of my symptoms can be because of ovulation too. But anyways I started spotting the 13th of August and then actually started my period the 14 and had it till the 17th and spotted again the 18th and 19th. Also had really bad cramps. My flow wasn't too heavy but it wasn't light either. Usually my period last for 8 days and is super heavy. The last time I got pregnant was when i only had my period for 4 days and my doctor said that it was implantation bleeding. So i'm wondering if its this again?! Or just my cycle is changing.. But I don't know if I should take a test now or just wait the 11 days until I'm suppose to get my next period. Symptoms i'm having : Bloating, tender breast, nausea, and peeing more than usual but its not everyday, my discharge is also a little different. I have been cramping ever since I got off my period. Do you think I should just try to take a test now or should I not stress and just wait till my next period.( Also I end ovulation today)