Hi I finshed my perid last Friday had sex that

Patient: Hi I finshed my perid last Friday had sex that day and I’ve done a overlateing test and I have 2 lines. Surely I shouldn’t be overlateing now ant it 4 says before my perid could I be pregnant and it’s pickin it up? I’ve done a pregnancy test and it’s saying negative I’m so confused I’ve being getting head akes tired too

Doctor: