15dpo symptoms and vfl

Hi everyone! I am skeptical and nervous but excited at the same time. We have been TTC for 2 years now and though I have endometriosis we have been trying naturally with no success as of yet. I recently purchased LH strips to help me determine when I was ovulating and used pressed this month. I usually have spotting half way through my cycle until my period and this month I have had none until 13 dpo which was very mild and brown and only when wiping. I also usually have severe pain and cramping in the week leading up to af and I have only had slight twinges and pressure. I noticed serious dark veins in my chest and on either side of my abdomen and have had fatigue and headaches on and off as well as unusual thirst. I had a BFN this morning but a very faint line this afternoon! Has anyone else had these symptoms before their bfp? Have you gotten your bfp later in the day although you had a bfn in the morning? Oh ya- temps are still very high for me! 💕 
*update* thanks everyone for your comments and encouragement. Unfortunately, repeat if the same brand this morning with fmu was negative and FR digital also negative. Temp still up (36.65 which is high for me) and still no period. I'll assume it's just late! Feeling emotional and crying lots but that's probably PMS and sadness  😢