Pain on lower left side

Charlie • Avoiding pregnancy tracking my cycle
I have a pinching feeling on my lower left side close to my pelvis, I'm on cd7 my period was supposed to stop yesterday but it only lasted till cd 4 and I have had spotting when I wipe and I tiny but on panty liner it's more like a watery/creamy spotting not actual blood I'm thinking it's because my thyroid meds were upped bit the pinching?