Pink discharge for 5 days in between cycle

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I’m not on birth control and my husband has had a vasectomy. So I know I’m not pregnant. I have done this the last couple of months as well, but it usually goes away after a couple days.

I’m 38 years old. I have been on thyroid meds for over 12 years and am relatively healthy.

Has anyone else had these issues? I’m getting so sick of always feeling like I have to wear a pad. Sometimes I experience some uncomfortable cramping before the pink discharge starts as well.. My period is still pretty regular. Every 26-28 days.