After colonoscopy gynae said i had erosion and used silver nitrate. bled 4 days no other concerns, 3 week 3 days later today i had internal ultrasound and bled bright red. im now worried again? ultrasound advised speak gp?

I assume you had a colposcopy where your gynecologist visualized and possibly biopsied your cervix. Your cervix appears to be friable and bleeds easily. I think you should continue evaluation and treatment with your gynecologist and not your GP as this requires a specialist. If you want a second opinion, seek one at a department of gynecology at a university hospital near you.