I had liver pain at around the 2 week mark of 12 weeks of Sof/dac/riba (geno 1b, F3/4) then it went away as did the feeling of fullness under the rib cage. This seems to be a very commonly reported symptom on Tx as Paul said.
But then it came back in the last week of treatment which freaked me out. As you're on led not dac, if it's to do with the drugs then it's either Sof or riba. You don't say if you're already on the Ribavirin or are doing it in the last 12 weeks. Of course, it may not be the drugs at all just the liver getting on with the healing process. Remember, if you comply with treatment you can't go backwards so don't worry that things are suddenly turning bad.
Anyway, my pains disappeared within 24 hours of me completing Tx and haven't returned. I tended to think it was the riba because the last 2 weeks of Tx were the only time I did it tough. Having said that, I wasn't even remotely anemic at the end. My hb was actually slighter higher than at the 2 week mark. Go figure. I'd be interested to know if you're already taking Ribavirin because my hunch remains that it may have something to do with that.
Huon Valley, Tasmania
Hep C+ since 1980s
Genotype 1b
F3/4
VL 480,000
Started Indian Sof and Riba, BMS Dac (comp access) 28 August 2015
UND at 4 weeks
Finished treatment 19 November 2015
12 February 2016 UND SVR12