Hey! 137 calories isn't terrible. The idea isn't to hit exactly the same number every single day, but to hit an average calorie target over time. Going "well over" your calories would be 500 or more...
One strategy for calorie counting is a technique called "zooming," and it involves eating more or less than your target, but in a planned and controlled way. The average for the week should still come out at your target level. For example,
1500
1500
1500
1500
1500
1500
1500
gives an average of, obviously, 1500 for the week. But so does
1500
1750
1600
1350
1400
1500
1350
close, anyway.
It works better for some people, not so well for others, so you'd need to try it and see.
When you're doing your meal planning, it's possible to include a snack in the evening so that you're not starving before bed but you stay within your calories for the day.
Remember, it's the average over time that you're aiming for. Calorie counting is never completely precise.
Jay