Very light brown discharge 5wks4days

DK

So I am pregnant with my rainbow baby, 5w4d, and everything has been totally normal up until tonight when I noticed the lightest brown color to my discharge. I have no cramps accompanied with it, but it really worries me after miscarrying back in April 😓 I had exercised a lot this morning (with Dr approval) for the 1st time since becoming pregnant so I don't know if that would have any affect? I am just sick to my stomach that this could be the beginning of another miscarriage 😭 I will be calling my Dr in the morning but until then have you ladies had any similar experiences? 😓 thank you in advance