So I was having cramps all day (like hunger cramps but all over my stomach) which was slowing me down at work. I ate as soon as I got home and I used the washroom (I thought it was constipation). It started to go away but when I went to the bathroom again, there was brown discharge in my liner. It was very thin and liquidy, like blood, but very dark brown. There wasn't a lot of it, but I've never had that before my whole pregnancy and I'm 25 weeks and 3 days. Should I be worried and call my midwife??