If the dormant hpv infection(hpv type 16,18) in my body is reactivated, will i be able to transmit that hpv virus to someone else?i got the hpv vaccine after my first sexual intercourse.i suspect i got hpv transmission during the first intercourse?

Most HPV infections are acquired age 15-30, so probably you were infected decades ago. Reactivation so many years later is very rare. If it happens, you might be able to transmit to your sex partner(s), but probably it will never happen. And many partners around your age themselves already have HPV 16 or 18, in which case they are immune to new infection. This is nothing to be worried about!