When should I test?

I've had a feeling I'm pregnant for about 2 weeks. I know this doesn't mean much but I've had two dreams I was pregnant and my mother in law has had one... Glow says I'm gonna start in two days. But my period is so irregular I can never go by that. I have had a period every other month for about 18 months but every so often I'll have one three months in a row. My last period was beginning of June. I have the urge to take one but scared it would be too early. Just wondering what anyone else thinks?