OVULATION!

Im meant to be ovulating on Sunday 5th. I started testing ovulation the day after my period. (Started period 21st Sept) and my tests were somewhat strong but not positive. I was told I might have just had a little peak as they went back down but now the line has completely disappeared and I'm worried that I have missed my Ovulation date. Is it possible to Ovulate so close to period? I have a cycle of around 30 days. Im quite new to all this so please any help will be greatly appreciated. Thankyou.