Advice

I’m just coming on here to ask for some advice. I’ve been to see my doctor and a gynaecologist about symptoms of endometriosis which I am having, the gynaecologist said he thinks it’s unlikely it’s endometriosis as he can’t see anything on the ultrasound however I’m getting pretty much all the classic symptoms of endometriosis. I have no idea whether to just take his advice and stop taking the combined pill after my next month and get an IUS implanted or whether o should speak to my regular doctor. After having a week to think about it I’m just getting more concerned that I’m yet again being misdiagnosed. Am I being paranoid that he’s misdiagnosing me or am I right to be paranoid?