What herbal things could i buy to help me last longer? and help my girlfriend reach orgasm.

Some ideas: Before you take medicine of any sort, try a dab of a topical anesthetic on your glans. Your next step is the squeeze technique -- do it with her. It's fun and will help your relationship as a couple. Communicating is the key -- find out what she likes the most, and continue learning to use your entire body, especially hands and mouth, as she finds most enjoyable. Congrats on your relationship.