9 DPO symptoms - Back ache, bloating, fatigue

Hi ! Just wanted some advice from more experienced ladies out there! I’m 9 DPO and I’ve had the following symptoms since 4/5 DPO. Back Pain, bloated, gassy, slight diarrhoea last 3 mornings at the same time, very watery cum (TMI SORRY). Feeling lethargic since yesterday with faint cramps that come and go. This is our second month TTC and I’ve never had such symptoms and that too so early on before AF, my cycle is pretty regular( 28-30days) Took a test today morning and got a BFN. Do think it’s my mind playing tricks on me or I still have a chance ? So confused and paranoid.