My cycles usually last between 32-38 days. I ovulated on the 30th or 31st of July (CD 20 or 21). Glow is predicting my period as due 8/13. I have had twinges in my lower abdomen since 6 or 7 DPO, lower back pain (kind of like cramping or sore), mild period cramps yesterday, and today I'm having cramping pain (but not like period cramps) in my lower abdomen/upper pelvic area. I took a pregnancy test (internet cheapie) this morning. It was negative.

Is there still a possibility or am I out for this month? Have any of you had any of these symptoms before a BFP?