Danni you could get a regular coffee somwhere and ask them to put foamed milk on top, so rather than using expresso for the coffee side of things use a medium roast which would have less caffine. Just a thought...

I have been known to do this at home because I love stirring the chocolate & foam... so I foam the milk at home & put it on top my plunger coffee, for my sweet tooth.

I should mention that my husband is The coffee Nazi and will not allow instant coffee into our house LOL... so he did most of the research the first time around when I was PG with Matilda and hadn't had a coffee in the first 10 weeks.