as you are not having pain during micturation probably you are not having urethritis
by trichomonas or other organisms.
but pain in glans and dots over there may be due to herpes infection.
its a viral infection.
it may cause numbness tingling
it can be diagonosed clinicaly by seeing the lesion.
so you consult dermatologist
who practice stds.
no need to worry .
it is curable.