I went to a spa and lady sit on my face with dress on and with panty i just smelled her rear panty she was fully dressed i think her but cheek touched on my face nothing else happend should i be worried or tested or should i go to a doc?

Sexually transmitted diseases are not likely in above described circumstances. Others, such as COVID remain possible and will have to be considered in case you develop symptoms.

From what you described, you are not a risk of any infection from smelling her panty. Even if your face contacted her butt cheek the risk of any infection is less than miniscule. For healthy diet: http://www.choosemyplate.gov/., exercise 30 minutes/day, drink enough water daily so your urine is mostly colorless, have safe sex, no tobacco alcohol weed or street drugs. Get HPV and Covid vaccines.