Is light brown discharge okay during second trimester (20 weeks), so far it's only been this morning, it's white and stringy with brown in it, no real pink or red. I did travel and swim yesterday, had sex, and stayed up late when I had a bit of a headache. No pain or cramps. Should I be worried? I found her heartbeat this morning with my home doppler, and I called my obgyn, but the line was busy or she wasn't at her desk. I'm really nervous, any advice or stories would be really helpful.

Update: my doctor called back and said everything is okay, and unless I see red or feel pain or itching we'll both be okay! So relieved, just need to rest and get fluids.