Chastity and orgasm denial discussion

Hi everyone, I’ve spent the last few months gathering up my bravery to begin a chastity experiment. To figure out what works for me and which setup is ideal, I purchased several affordable steel devices. The main issue right now is that I can’t stay locked for more than 4 or 5 days. It seems like I have large testicles that swell even bigger after that period. I experience a persistent ache (likely due to the weight) and increased sensitivity, making it painful to walk with my legs close together. After an orgasm, things return to normal within a couple of hours. A similar state occurs when I am not in chastity but haven’t had an orgasm either. I’ve experimented with different ring sizes and wearing tight underwear, but neither helped much. It doesn’t seem like primarily a medical issue; I recently saw my urologist who confirmed all tests, including sonography, were negative and that I’m healthy. Any advice on how to manage chastity so I can get past the 5-day mark without discomfort? Do you have any device recommendations, or should I try techniques like milking or having a ruined orgasm to relieve pressure?