Intermittent fasting and missed period

Hi, has anyone ever missed their period due to intermittent fasting? I’ve taken a few pregnancy tests and all were negative. First day of last cycle was 21st June, and my cycle has been irregular all year (but I started fasting in June 2019), so I was expecting it to start around end of July 2019. So far, nothing, but the last few days I have been very gassy.