Thanks for an elucidate history.
It says you are suffering from ear infection
since 2 weeks.
By this time it has increased in severity to such an extent that the mastoid bone and the structures within it and around it have gone into complications like vertigo
, Stiff neck
, fever ans all other symptoms.
This is a serious condition due to proximity of the brain.
You need to have a CT scan
of the mastoid and brain to see the extent of the complication and further management.
Because of your pre-existing medical condition you may need multi-specialty approach .