wtf is happening 👶🏻😰😥

I got negative on my pregnancy test 8 days Before af ... then 3 days after got a BFP  i tested with clearblue first response.... after 4 days i tested again and the test said 👇🏻
| Not pregnant | 
That day ... Before i tested negative i bleed but just a little bit and it lasted for 3 days... normally my period last for 5 days and a little more heavy...  i had No cramps or anything . one week later after testing negative ...i feel so ill  i just want to throw up and i have a headache ... a little bit pelvic pain ..... yesterday my panties was wet but there was No discharge ... i dont understand nothing ... i am going to Doctor for blood test tomorrow ... what do you think?