Quick Question

In November I had my IUD taken out and we have been TTC ever since. I nothiced today that when I wiped it was a very light brown on the toilet paper. I am only on CD 12 and the past 2 days including today I had egg white CM, very very stretchy. I am really bloated and plan on calling my dr in the am. Is this just breakthrough bleeding? I know brown blood is old so I assumed breakthrough bleeding would be pinkish. But this is the very first time I have ever noticed it. Any ideas?