Am I pregnant

Kristina • Hi, been ttc for 15yrs now now. We`ve been on a roller coaster ride for stop and then trying cloud, sperm analysis test. Because it`s so expensive fertility Dr is out of the question.
 ovulated on around Sept 14th,  then spot of blood on 20th.   Tested negative today.  Any other time, because been ttc for 15 yrs,  I would say oh well,  but the spot of blood has me puzzled.  Thinking I may have tested early,  IDK?