Advice on ovulation.

I think I'm going through ovulation bleeding, this is the first time I've experienced this. But I just started using Glow in May & until then I wasn't for sure when I ovulated. I've been wearing a tampon bc I'm spotting on it & when I wipe. I kinda hurt, cramp& just feel blah. Is that normal? I'm also tired but I had a long busy day yesterday with not much sleep. How long does this normally last? Any advice is very helpful.