I know I am just going to be told I'm an idiot but I'm fine with that and just need to offload somewhere anonymous. I had unprotected sex on Sunday, which I'm 90% sure was cycle day 8. But ever since then I have had signs of early ovulation. I had all my usual ovulation symptoms from cycle day 9. I checked my period tracker (which I haven't been updating exactly so can't be 100% accurate) and realised that my last period came early, so it is possible my cycle is now shorter and cycle day 8 was actually a fertile window. Now I'm on cycle day 12, 4 days post sex and I've had moderate cramping all day. Exactly like period cramping but milder. Sometimes I get ovulation cramping but this has been more obvious I think. 4 days after sex is far too early for implantation though isn't it? So I'm thinking more likely placebo cramping?