I think the bigger issue here is that you have eaten chicken and chocolate.
Practicing self control is going to go a long way with your success. In addition, now is not the time to test things. That one piece of chocolate could have sent you over the edge and made you ill for hours or even all day.
You stomach needs time to heal, a tiny little shred of chicken could get caught on a stitch or staple and cause major problems, like infection.
The 30 minute rule is so that you are not "full" of fluids when you try to eat and actually have room for the food. The 30 minutes after is to allow the food to stay in your system long enough for your body to absorb it's nutrients,a s the water will push it through your system faster. Not the end of the world if your forget sometimes but it may make you sick when you start more solid foods.
Refocus, you can do it.