What a beautiful story! It sounds like you are very excited to have found your true love, but also a little nervous that the two of you are moving so fast. It's good that you are thinking through this decision.
However, there really isn't a "definite" time table when a couple should move forward with marriage, so I'm not going to tell you that you are moving too fast.
What I am going to say is, if the two of you are committed to each other and willing to work through the tough times you may have, the two of you will be great together, regardless of how fast you got married!