Is this normal?

Wiped this morning and there was a little yellowish discharge and I've felt nauseated and slight back aches as well. I just finished my period yesterday and it lasted seven days. I also took plan b two weeks before. And I've been digesting a roughly large amount of fiber lately due to my diet. Is it normal for me to have these symptoms? Because the nausea doesn't last me all day just a few hours after I eat.