Is it sort of essential?

To habe implantion bleeding?

Early this month i had my bfp but had no implantation then i had a chemical..

Ive read alot of women who said they had implantion bleeding then had a bfp

So my question is... should you be having implantion bleeding or can you sometkmes not get it and everything turn out ok? As soon as i got my bfp i just knew something wasnt quite right