I'm not sure if you have a good understanding of the nature of disease progression of alot of sexually transmitted disease.. I have a feeling though you will.
Here's 3 to start with.
Antibiotic resistant Gonorrhea.
Annoying for you but your children can be born blind.
Syphilis.
Symptoms in the primary stage come and go .
Then come the secondary and tertiary stage.
Do some research here . This will be great fun for you
Herpes.
Sure your immune system can handle this but unfortunately the virus lives forever in the dorsal root ganglia where there is no way your immune system can kill it off this little bastard and when you are run down they migrate to you olf fella.for a weeks holiday.
I am assuming you are human though and not Planet Krypton . If you are from Krypton, disregard this advice.
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