ovulation advice

Hi all trying to conceive, I know this is a lengthily process so I'm not complaining been at it nearly 2 years but I have a 28 day cycle and I normally ovulate on day 14 without fail every single month. My partner and I live quite a distance from each other so we don't get to do the deed that often but this month I haven't yet ovulated and I've been testing when I'm supposed to we are on day 18 now and I'm just wondering is it normal for ovulation date to change? I'm expecting my period in 10 days but also concerned as to why I haven't ovulated yet. Is there any chance I could have ovulated early? Or am I just being a crazy lady wanting a baby? All advice welcomed, baby dust to you all 😊