Frustrated with early symptoms after ET

[PatientMum]

Dear ladies, I wonder if any of you has had a similar experience: I underwent about 8 embryo transfers in the past three years. In half of the cases, all resulting in either chemical or a MC, I started feeling pregancy symtoms increadibly early - just the following day after the trasfer, which is days before implantantion is completed, including and mainly a clear change in appetite preferences - craving unhealthy food such as greasy fast food-, fatigue, increased temperature, sleepiness. In the three chemical pregnancies, those symtoms ebbed and finally disappered shortly before I was due to test. All were faint BFPs but about a week later AF arrived. Same happened with the MC, only symtoms lasted longer. How come I start these symtoms days before implantation is complete? Am I some kind of a super-sensitive freak? It's so painful to see the symptoms grow and then ebb and lose hope. I hate it. It's just happened again. In the other four transfers I had no symtoms and all ended in BFNs. Has any of you experienced something similar?? Or heard whether this is normal? Wishing you all a sticky BFP very soon!