Can anybody help me?

So last month I had a 35 day cycle, Glow said I took my pregnancy when I was only 6 DPO, but I think I ovulated before then, just don't know when. But I tested 6 days before my missed period and got a positive. I miscarried 2 days after my period was suppose to start, so I'm guessing the day I bled would be the start of my period? This month, according to glow I have a 33 day cycle and currently on 6 DPO. But I still have 8 days before my missed period.. I'm confused as to when I can test?? Idk If all the info on here is accurate. Thank you!