New to glow

I joined glow last month. In October, I experienced a miscarriage. I joined glow to help me keep track of my cycle. I have two kids and my husband has none of his own. I desperately want to give him his first child. Because I miscarried in Oct, I wasn't sure where my cycle was. After some research, I did my best to conclude when my hcg levels were down to 0 or close to. My conclusions were based off blood work. Glow predicted my period perfectly last month. This month I'm late. I haven't tested yet to prevent disappointment. Has glow been accurate for most of you?