Going to an event

Hi! At my college, in the English club I joined, my teacher is a part of it and sent an email to me and another classmate inviting us to go on a trip. Everything including transportation to and from the college would be paid for, and I think it would be really good for me to go. I wouldnt be home all day though, and even though I already asked my mother for permission and she allowed it, the thought of being gone makes me a little bit anxious, like Im doing something wrong. Like Im disappointing my family, even though I see them every single day and rarely leave the house unless its for classes. Im also worried about not getting to see our pets, and it sounds a little bit silly, but I miss them and it makes me feel bad when my mother send me pictures of them and says that theyre looking for me. I want to go on this trip but Im really worried.