Follistim

YNA • IVF BFP 5/14, MMC 7/14 FET BFP 11/14 DS1 7/15 FET BFP 6/16 DS2 2/17 FET BFN 11/18, FET BFN 2/19 FET BFP 4/19, baby girl due 12/19
Hi!  Anyone have any experience with follistim?  I did my first injection of 75 units this morning and am now wondering if I should have done it at night ...  Does it make a difference?  Tried calling the re but they were closed...