20 days to transfer????

Li
Help me out here with some understand ladies. I'm supposed to have my ER on Tuesday. I was talking to the nurse and she says after I get my period I'll go on more drugs to prep my uterus. About 20 days from my ER I'll have the transfer. Is this normal?  Does that mean it's only going to be frozen eggs (no fresh transfer)?  I'm so confused😐.