When I went back to see my therapist for the first time after not being in therapy for 8-10 years, we couldn't make an appointment until two weeks later and that's what I did, just went in and dumped on her the first time. She even commented that her head was spinning afterwards :-)

A lot of your anxiety is about going to see the therapist and what you'll say and how it will be and how do you sort through all this and pick and choose and if you start here she'll be lost because you have to start there but there's too much to start there and you forgot the other. . .

It's hard to do, but accept that that's how it is and will be for awhile. Very uncomfortable but not permanent.