Advice needed - 6 weeks pregnant and my Dad having chemo

Hi all - would love your opinions. 

I am currently 6th week of pregnancy with my first and so far so good. I am visiting my parents in a week as I have every other week as my Dad had Non-Hodgkins Lymphoma (fairly good prognosis so far) and is having his 3rd of 6 chemo sessions in a week and a half. He has been very ill and in and out with infections etc and I really want to bring both him and my mum some good news to look forward to. I also don't think I'll be able to get away with not having a drink with my mum/a coffee in the morning etc. 

It is so early still and I'm worried about miscarriage as still around a 19- 20% chance when I see them and that it would be more upsetting if I then subsequently lost it.