I don't know how reliable tests are from ebay but you cld get a 10 miu test it will say in write up about the pregancy test i think it's usually strips.
I think they would of tested for pregnancy in hospital at risk of it being ectopic if you had pain on one side, I'm quite shocked they didn't mention it tbh. I would say do a test and go back to doctor explain not happy about the whole thing, you never know it cld be a
Good Luck keep us informed!