April - May = 1 Month
May - June = 1 Month
June - July = 1 Month
July - Aug = 1 Month
Aug - Sept = 1 Month
Sept - Oct = 1 Month

You said you paid for 6 months, right? Well, it's a little early (I think it'd go through on the 4th), but it's about time to renew, yes?

Also check your email. They always send out an early notice before renewal.