Thank you for writing.
HELLP is indeed seen in pregnancy but would not happen a week after conception (you mentioned you engaged in activity - if you were to get pregnant for this, conception occurs 5+ days after the activity) so were only talking about 9-10 days here. HELLP is generally seen in the last trimester, definitely not 10 days.
Have you taken a pregnancy test? If not , do so. I am also curious about what HELLP symptoms you are having and who diagnosed you with HELLP?