immune condition that affects HCG and potassium lab

Has anyone ever experienced a immune condition that that may cause false normal potassium labs and may sometimes cause both urine and blood to be positive with low levels of hcg sometimes sometimes blood is positive with low levels of hcg sometimes urine Is negative sometimes urine is positive with low levels of hcg and sometimes blood is negative and sometimes they are both negative and the strange lab results continue for years pregnancy like symptoms continue for years and may continue to experience pregnancy like symptoms even when no hcg is detected