Itching down below.

First of all sorry if this is in the wrong spot.

Ok so for about the last few months i've been getting itchy down below, mainly when i'm sweating (in bed, gym or astro turf)

Symptoms: itching near the public bone, side of scrotum and anus.

so I was searching online and the closest thing I found close to what the symptoms were and the answer I got was Jock Itch - which reading up home remedies a few comments said athele's foot over the counter products so I purchased a bottle of the powdered Scholl and coming to the end of it now and no luck, problem is still there! Although when I use the powder it stops the itching and when I stop using it (did for a week once) the said area got itchy, redish and sore (like a rash)

So I thought I'd come on here and ask for advice or previous experience of anyone who thinks they had something similar because I'd be ****ting it going for an STI test.

Thanks in advance.