Antibiotics without examination AGAIN ! Why would heavy bleeding be caused by infection
. He would have done better to have prescribed medication to stop the bleed .
It may be that the 'slight thickening' came away in the flooding due to the Mirena being removed. Apart from the worry how do you feel otherwise, like you've had a period? Why draw attention to a slightly raised CA125 test now and not immediately? It's probably because the GP is trying to find something to justify your bleeds?
The Health Service is supposedly open for business but it doesn't sound like it. Diagnosing any one with worries over the phone is, in my opinion, extremely dangerous.