Have you talked to her about this? It's really important to have a lot of open communication in a relationship (as I've found out the hard way) and you need to tell her that you think there's a double standard. Ask her if she can do this for you, and try and hold her too it. I think she should be supportive of you, and if it gives you anxiety she should help to reduce that. And that's not asking her to throw her life away and sit with you every hour of the day. This is a really small thing to ask her to do, that means a lot to you. Plus, it will strengthen your relationship with each other.

And this is coming from someone who hates calling people, and forgets to all the time.

good luck, And you have my support for this.