Not to sure if I’m pregnant

I am a 19 year old and have been TTC with my fiancé. I am over 6 days late with my period. As of Monday (nov.26) I started spotting and this morning(nov.27) till around 10pm at night my pad just had a line of blood very very light. As I put a new pad on there has been no blood at all. I have no cramps just have headaches everyday. I have taken 2 pregnancy test and they both show negative. My period is usually a heavy flow so I am not sure what’s happening with my body at the moment. Am I pregnant or just having a very late period.