Ashley, you're seeing an endo for HRT.
Not sure what the procedures are in your state or even anywhere, but someone I respect in the TS section once mentioned that it's a good idea to see a gender therapist who won't automatically suggest HRT to see if it will calm down your anxiety, but who instead will first rule out any comorbitity (the simultaneous presence of other conditions, for example depression or general anxiety) before giving the OK for HRT. There are good reasons for this. One, you want any other condition to be taken care of before you begin transition (other conditions don't necessarily go away once a person transitions and can in fact complicate things) and two, taking care of other conditions might help you see a clearer picture with regard to your gender identity. If the decision to start HRT right away is putting you in a tailspin, you might want to see someone who has a more holistic approach. Listen to your gut feelings.
I don't know if you've revisited your past threads. It might be a good idea to take a few moments and track back through your timeline. You can gain some insight there too.
I'd be wary of the "you go girl" advice here. You need to follow your own path.