Stopped the depo injection (was due to renew 2/11) had a period a week later lasting 3 weeks. So haven't had a period for 9 weeks.
Pregnancy test was negative again this morning.
Have been getting the usual simptoms like sore breast a few weeks ago, have put on a little weight and now have v.small bump.
I do have two children already, and I do feel pregnant.
I could be as much as 3 months pregnant but Doctor doesn't want to know. As Im A rhs Neg it worries me a little.
Could I be pregnant? Any advise?

These may be all symptoms of you stopping the Depo shot. But because you are Rh- it would be in your very best interest to find another doctor.

I agree, a second opinion should definitely be in order.