Had a really bad cramp earlier today when I went on break at work and when I went to the bathroom I…

Had a really bad cramp earlier today when I went on break at work and when I went to the bathroom I saw I was spotting. I called my ob and he said it sounded fine but to just watch it. Noticed a little bit more spotting when I went to the bathroom again. Does this sound normal to the rest of you mommies? This is my first pregnancy so I'm worried about everything lol