Embarrassment

So my boyfriend and I love to camp and hike and he has this bag that’s called a edc bag. That basically means everyday carry bag. He’s making me one for emergencies Incase the apocalypse happens. So we are in the store to get stuff and we get to the period are and he seems so relaxed and comfortable and wants to know what to get. The type the size the everything and I just get instantly awkward and weird and I try to push him out of the isle. I felt so uncomfortable. I have had my period since around 12ish and I am 19 now why am I still shy and a child about this 😑😩