It is scary speaking about feelings, and I remember before walking into my shrinks office, I felt very nervous. We all wish there were a magic pill to fix everything, what works for one may not work for others. The first step is often harder than the rest (apologies for all of the clichés) don't be afraid of having a melt down in front of your doctor they are there to listen as well as diagnose. You have opened up on here, maybe more than you thought you could or ever would, writing down how you are feeling can really help, and if you are worried to the point where talking is unlikely, copy your post and show that to your doctor.
Doing nothing will likely cause what you are going through to stay with you, should you have a bad day, the smallest thing may make things seem too much to handle.
As far as approaching your doctor, if you decide to write down how you are feeling, have the piece of paper in one hand and as you go for your consultation, shake hands and pass the paper to your doctor, "hi or good morning " should be enough.
I hope this helps.