Why 5 days?
I going to tell you right now, that when you are married, there will be even harder things to talk about, that will have to be addressed much sooner.
This "We have to talk" speech will not be your last. There are many more to come, and if you think this is hard, then you may find marriage impossible.
No matter what the outcome of this one is, you will still gain precious experience when the time comes when there's a lot bigger stake involved. Like Mortgage, and children.
Bro... don't be a pussy and man up!
I know you are scared, but so what. If you think this is scary, just wait for what life has got for you in the future.
Women need to know that their man is in control of himself. Being a pussy is not control. You haven't even called her yet, and you are well on your way to losing her respect if she still has it.
Sorry for the harsh words, but somebody's gotta say it.
Put your big boy pants on and call her right now, or move on!