What could this be??

Heather • Nursing student, raising two beautiful boys and have a loving hubby! I`m the queen of my own castle!
So I ovulated early according to my glow thing and now tonight I went to the restroom and had spotting. But I really wouldn't even call it that. 
Not heavy but the past few days I've been moody and crying and when I was working out the other day after we got done I had to run outside and throw up. I haven't felt "myself" the past few days??? Any input would help.