Hi. I Have Been In Thailand 2 Months Ago. I

Hi.
I have been in Thailand 2 months ago.
I had massage ended by handjob. My semen cums and she cleaned with towel, again back to my penis and kept moving untill i cum again, but this time she kept moving and didn't clean, and then we finished.
She was wearing long pants, and only her hands touched me.
It was oil massage.
Now I started having flat red spots on stomach sides and in back. Some of them getting more down upper penis. They are sometimes a bit itchy.
Am afraid If I have catched something bad.
Am 28 years male.
Should I worry and go for tests?
By the way, I startes a diet 50 days ago and am practising and eating few.
Also am working outdoor and its too much humid.
Thanks