Thanks for posting your query at DoctorSpring.com
I have gone through your question and I can understand what you are going through.
If you were having a good erection previously then looking at your age, the current state of reduced erectile strength could be due to anxiety or fatigue. Its been only 7 days and I would suggest that you give it some time. Spend some quality time with your girlfriend. Involve yourself in other stimulatory activities other than the sex. Take good diet and lots of liquids.
It should get better in next 10-15 days. If it still doesn't then your may require a penile Doppler study to look at the blood flow of the penis.
Hope this helps,
Dr. Srikanth Reddy MD
Patient replied :
thanks for reply.yesterday i has sex with girlfriend. i have to press penis to be hard and after too much time it become some hard and it was inserted in pussy.but it was for very small time. again it was became loose.l suggest me tablets or medicine to increase blood circulation in penis.
Generally is these cases I prescribe my patients 50mg of sildenafil to be taken 1 hour before sex. It helps in most cases. However as DoctorSpring.com is an online forum I wontbbe able to prescribe you medicines here. Sorry for the inconvinience caused.
Dr. Srikanth Reddy