Hi.
Thanks for your query.
Read and understood your history and concerns.
The history says you had a lump in the skin of the penis, you took antibiotics for fear of infection and the lump ultimately opened up giving creamy, yellowish orangish fluid.
So this was a infected sebaceous
cyst and may get completely resolved.
Your another concern is the Jock's itch for which you have tried so many things but not amenable.
Actually the problem lies with the temperature in which you stay, work, sleep.
If you can stay from the hot and humid temperature, use really loose clothes, keep the area ventilated, work in AV environment, clean the area with plain water and keep dry with hair dryer can alone heal it up.
This is the only solution.