Symptoms-8dpo

I’m 8dpo. I took a first response early pregnancy test, and it was negative. I’m cramping in my lower abdomen/sides, lower back pain, feeling a little nauseous, and I recently seen veins on my boobs. Anyone else got a BFN at 8dpo, and turned out to be pregnant? I had a miscarriage last month, and me and my significant other are REALLY hoping the symptoms are pointing towards me being pregnant. 😬😬😬 I thought I saw a VERY faint line, but my eyes can be deceiving. I know 8dpo is too soon, but I tested positive last time at 8dpo. This is stressful 😩. When should I test?