That bloodwork looks ok and the top of normal haemoglobin, haematocrit, albumin are not a worry. You may have been a little dehydrated when they were taken, and this is really the only cause of urine that is dark, then light, then dark...
It seems pretty common for patients to have liver location sensations under their right ribs after treatment. This settles down.
Your itch is unlikely to be liver related. The itch from liver problems comes from high bilirubin, and yours is not high.
The fact that antihistamines help suggest it is an allergy type itch so you need to look at washing powder, soap, shampoo... any anything else that is in contact with your skin. Often, when patients get a global skin itch it relates to changing one of these (but sometimes the manufacturers change the product).