You might have given correct and complete diagnosis after your scan.It cannot report as Large shadow over the liver.
It can be liver abscess
where there is sever pain.
But,get liver function tests and also find the complete name of the liver problem.
If the liver shadow cannot be diagnosed by ultrasound,go for CT scan abdomen.
If you come back with CT scan report,i will clarify further.
Till then,take Antibiotic like Cefuroxime
and Anti inflammatory drug.
You have to change the drug for high Blood pressure
as it is not controlled.
Wish you good health.