New to ttc

Ok so I am New to this... I just started tracking my cm and I have a cold just a stuffy nose I started taking mucinex Monday and yesterday morning I noticed after a bm I had EWCM I. Never noticed it before and later on that day I checked again and I couldn't find it...Today I checked and it wasn't as stretchy as it was yesterday I am on CD12 today...What do you think? Could I have ovulated yesterday?