Nervous survivor

I was diagnosed with overian cancer November 2018 Stage 4, low grade.  I had debunking surgery and 18 weeks of chemo, carboplatin and Abraxine.  I will take Letrozole for life.   There was still overian cancer remaining in my left breast and a lymph node under my left arm.  I had surgery May 1 to remove the lump and node.  I was told that was the only remaining cancer seen.  I go back to have a CT scan and my follow up appt late June.  I am very nervous about the follow up.  How do I get past the worry that any little ache is the cancer? And the worry that it is coming back?