Poor quality embryo transfer

An

I have been silent on this group until now. We had only 3 eggs collected from 7 follicles a week ago. When I went in for our 5dt they said our only blastocyst was grade 3 out of 4 (1 being the best). They said it was good enough to transfer but not good enough to freeze. I’m worried that my chances are so slim that it will stick 😢 they did say that as it was super early in the morning it was 4.5 days since it was fertilised and could grow some more cells. Anyone have any words of advice or thoughts on whether my chances are slim?