Glow says I'm ovulating, but all my tests come back negative?

Amanda
So according to Glow I started ovulating yesterday. I've been taking ovulation tests and they're all negative... I'm on cycle day 11. I feel so confused. Have I not ovulated yet? Will I ovulate at all? Can my cycle length change now that I'm not on the pill? It used to be 28 days like clockwork. AF started on the 20th and ended on the 23rd. So I SHOULD be ovulating... Can someone give me advice? I'm getting really discouraged.