6dp5dt Pregnancy Test

I decided to take a pregnancy test this morning after reading extensively as to why I should not 😅. I had my transfer on Monday December 16 and on Wednesday the 18th I felt so sick. I had headache, nausea, lower back pain, felt like I was coming down with a cold, and bad cramping that felt like a stomach bug. Then on Thursday And Friday morning I had diarrhea (tmi, sorry), but all my other symptoms were clear and I felt completely normal. I was sure it was my body rejecting the embryo. But this morning I think I got a faint line on my pregnancy test. There looks like there’s additional lines below it. What do you all think? I will be cautious with my excitement 🙏🏼