Low Carb Question

I did Atkins years ago and lost 37 lbs on it but as everyone knows it is a cold turkey carb diet....well, I started watching my carbs 10 days ago and I feel great--lots of energy and I am sleeping better at night--my question is...we eat with friends ALOT (cookouts, etc) and I was doing awesome last week and then we ate with our friends and it was spaghetti (no option for me there )--so I ate it ...but the next morning I went back on low carb..is it okay to have a higher carb day when counting them...I am basically trying to stay below 20-25 carbs a day but one piece of bread and that is blown out of the water.