Postpartum period

Amanda

For the past week I’ve had cramping it hasn’t been bad until today but I haven’t had any blood. I gave birth to my second baby in February and I haven’t had a period since December 2018 (before my first). Today my cramping is really bad. I took a pregnancy test this morning but it was negative. I’m still nursing my youngest but a week or two ago she started sleeping through the night. I don’t know what’s going on or if this is normal, but any thoughts, ideas, or opinions?