Spotting

I'm currently 5 weeks 2 days with an ivf (icsi) baby. For the past two days I've had some brown discharge (getting a lot of discharge due to drugs in taking from Ivf still anyway) but have noticed this morning a bit of pink when I wipe, I know not to worry to much unless it's bright red bleeding but is this normal? I've had no cramps out of ordinary or increased pain. Thanks in advance!