What is it 🤦🏼‍♀️

I just got off my period four days ago and I barely cramped (which isn’t normal). Now I’m off it and my breast are SO sore, I’m cramping on and off and I’ve been having almost clear sometimes white stretchy discharge.. I haven’t started opk yet because I didn’t think I need to this early.. but should I start opk’s now? I have no idea what’s going on because this has never happened and I’m confused 😂