2 anti d injections in 2 days

Ewi

So yesterday I had my 28 week appointment with my midwife and i had my injection- big dose she said.

Later after that I had some bleeding, I went to hospital, got checked and everything was fine.

I just received a call that I need to come to have another injection and to come in 2 hrs.... I am so confused.. Isn't it too much? I mean it doesnt make sense to me. Anyone had similar experience?