Talk to Urologist on Problem In Achieving Errection Suddenly

Hello Sir, I am 27 years old male newly married, Everything was absolutely fine till 2 months of my marriage but now suddenly, I am facing a problem with sexual activity. I m not achieving errection since last week. whenever i m trying to do it i feel like my blood pressure is dropping in my lower body and i don’t feel anything in my penis area. Kindly suggest.