I'm four months pregnant and I have started bleeding "down there". Is my fetus gonna be ok? Should I see a doc?

Roy Lee "Rocky" Dennis (December 4, 1961 - October 4, 1978) was an American boy afflicted with craniodiaphyseal dysplasia, an extremely rare, disfiguring, scl bone disorder. The condition usually results in neurological disorders and death during childhood. His body was donated to UCLA Medical Center after he died.[1] His life was the basis for the 1985 feature drama film Mask