I'm baptist and I bought a virgin Mary symbol to wear on my neck also of Jesus death on the cross i?

There is no “should” about it just associated with being Christian. That is, there is no moral requirement to wear one if you don't want to. Some denominations require wearing crosses as part of their community… but you don't have to be that sort of Christian.
So it is not wrong to have a Jesus on the cross on the same necklace.