HIV PCR Test whilst on PEP

Hi there. I'm on Pep meds [Kaletra and Combivir] after an accident (burst condom). The meds are making me very ill and I think I'll struggle to complete the 28 course.

Q: Can I take a HIV PCR test at 10 days even if I've been on the above meds, or will the meds interfere with the test's validity? If PCR test is negative at 10 days, is it true that there's around 95% accuracy? I think I'd risk stopping the Meds if that's the case, as I know the contact only has HIV1. He gave me all the details he could about his status, meds, etc.

I tried searching the Forums but couldn't find this. Hope this query makes sense and you can help.