Why is my CM Yellow?

It’s not an STD. My husband and I are very clingy and have never slept outside our marriage. We’ve been together for 1 year and the longest we’ve been apart is 4 days and he’ll call me on FT the moment he leaves the house. If he did try to cheat it will be virtually impossible. This guy would stay in his car if he sees my car at work and wait for me to come out of the building just to see if I’m okay. We’re TTC and I’ve been having a lot of cramps and gassiness. Period isn’t due until March 6 and it’s been over 30 hours since we BD. WHAT CAN THIS BE? And there’s no odor

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