Difficulties with wearing a device? discussion

Hello everyone! I’m hoping someone can shed some light on my current situation. I am new to chastity. When I got my cage I joined and got to talking to someone I met here and they suggested that I work my way up to long periods of time under lock. So on day 1 I locked for 3 hours, day two was 6 hours and now I’m under lock for the third time and on hour 17 of 24 before I get released. About an hour ago I started to get that “I just got kicked in the boys” feeling and it has continued. I have had no other issues or discomfort other than that. My avatar is the cage I’m wearing. In addition, for this 24 hour lock I decided not to use the urethra insert. I have also uploaded pics of me in the cage. Is this possibly a sizing issue? Will it just take time for my anatomy to get use to not ejaculating as often? Any thoughts or advice would be much appreciated, Thanks in advance!