15dpo

15dpo no af. Creamy discharge, woke up twice with random sciatic back pain, breast hurt at the nipple and sides near armpit, nauseous, cramps for 2 weeks now, headache that isn't going away, constantly craving peanut butter ice cream,flushed but lower than normal temp? Bfns on 11dpo and 13dpo. Is there still a chance? When should I test? Has anyone else experienced this and later got a bfp?