Agree with PP get yourself up to maternity ward tomorrow & ask for a blood test. I had ICP or also called obstetric cholestasis, also like PP was diagnosed after second blood test, a week later. I initially had itchy feet which then spread to hands & rest of body itched too. I too was on daily meds & in hospital for at least weekly monitoring, they also do bloods & liver scan etc to make sure no underlying issues. I was induced at 38 weeks. They typically will induce at 38/39 weeks but if your blood levels got really high would possible do it earlier, you also will have to give birth in a consultant led ward & will get monitoring during birth.
Don't go googling & worrying!!! There is some scary stuff out there but the research is (very) old, the consultants are clear now that with medication, monitoring & early induction any risks are reduced to pretty much the same as someone without the condition.
In terms of managing the itching, mine got soooo bad before the meds kicked in, that took about two weeks but once they did my levels & the itching really settled down thankfully. Speak with midwife tomorrow about anti-histamines, they are generally fine to take during pregnancy, they don't really help with the itching but they have a mild sedative affect which can help to sleep through it. Cold is also what helped me, so I bought loads & loads of ice packs!! I had some in the freezer & also bought the first aid types that you can just shake - I would sleep with ice packs on my hands & feet! We went to the theatre one day & I had to take my shoes off & put ice packs on my feet, I must have looked a sight! If you've ever watched friends I was like that episode when Pheobe got chicken pox & she's not supposed to scratch!!
If you do have OC/ICP it can be pretty miserable - people underestimate how unpleasant itching is & can really affect your sleep so find ways to look after yourself. I worked from home for my last few weeks after diagnosis as was so tired & uncomfortable. The main thing to remember is that your baby should be absolutely fine & this is temporary - pretty much the moment baby was born the itching stopped. I now have a gorgeous little girl, nearly 5 months old & she's healthy & well.
I was quite worried when I was originally diagnosed, pregnancy can be stressful enough right & didn't know anybody who had it to speak to - come back & chat/ask any questions if it will help!
Xxx