Introductions discussion

Hi all. I’m set to wear my chastity device for a week, and then extend the period.. I purchased a HolyTrainer in Small pink.. The query is.. Is this unit too small and might lead to issues over time? tube inner length: 48 mm tube inside diameter: 34 mm count of air holes: 3 When soft, my penis measures about 3-4 inches.. When erect it’s 7 inches, yet I can slide into the device with ease. Wearing it causes no pain except when I stir in the night and feel my balls and scrotum being pulled.. This was enough for me to stop wearing it. It looks like just my penis pushing the unit further back creates a large lump right at the tube’s opening. Anyone got advice on using a device out? The very end of my penis often gets rubbed raw by my boxers.. I’m thinking about wrapping the top part with some bandage.