I'm nervous about this college field trip?

So I'm a sophomore in highscool and like in 1 week my class is going to a field trip to a college that's like 2-3 hours away from our school. We won't be coming back home until later on at night time around 9pm cuz it's a long drive back and plus after we're finish with the campus tour we are going to this place where there's arcades and games and the whole class is going out for pizza. So the whole thing is gonna be all day.

None of my friends are going to the field trip and I'm So shy. It's mostly the popular kids with groups of friends so yeah.well maybe there's 2 kids I know that are nice but I'm still not sure. Plus we don't have to be in chaperone groups. Just roam around with any friend. What do I do?

I'm supposed to get my menstrual cycle around the time I'm going to the field trip and I get horrible cramps and heavy flow. Can't wear tamponds

Do I bring my school backpack (obviously with no books) to this field trip? Cuz I'm planning on bringing my iPad to use for the long drive and some water with snacks and money just incase. Or is that too weird to bring to this type of field trip?

Also I have to go cuz my parents are making me go plus I already paid for it and there's no refunds.

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