I have never had this problem before but this new girl I have been seeing has mostly been with older guys and is alot more sexualy experienced then me. I get anxious when we have sex because it is very had to get her to reach orgasm. I feel like i'm gonna orgasm right away. My doctor gave me some viagra but all that really did was make my head hurt. What can I do to make myself last longer. I have tried the stop start method but that makes it harder to please her. I have tried rings and even the viagra didnt make me like super hard and able to keep going

Hmmm.... You can't change your inner features!
Strange, I don't think that your doctor didn't know that Viagra isn't suitable for such problem!! Do you have ED too, maybe?!
In my opinion you just have got a girl out your (sexual) potentiality! As you know in a relation also the sexual harmony is an important point to value with care.