14 dpo with brown spotting.

2nd cycle using Vitex. opk, LH surge cycle day 12. O'd cycle day 13/14. Was pretty excited I had not had mid cycle spotting until slight light brown spotting 9dpo (hoped it was implantation) only once when I wiped, bfn though @ 10 dpo. Then again started spotting brown 12dpo-today 14 dpo but only during afternoon. Used only 1 tampon each day to see what was close to cervix and only brown blood with clear cm. have had horrible lower backaches also from 2 dpo-today. Increased need to have BM ( weird) since O'd. Super irritable. Sore breast 10 dpo- today. Got 1 pimple 12 dpo.  App had my period to start today, but havent. I have started on time last two cycles, so this is diff. Scared to test. Want to wait it out. Horrible lower back aches is a new symptom, from hip to tail bone to other hip. Anyone get a bfp with similar symptoms?