Ay, congrats sa baby mo! Kaya mo yan! Okay lang ang yellowish discharge sa 5 weeks, a few of my mum friends had the same thing early on, and it turned out to be totally normal. The cramping sa lower abdomen is usually just your uterus stretching and adjusting, so na-experience din ng marami yan, pero honestly, yellow discharge can sometimes signal an infection din, so it's a bit of a gray area, some moms it was nothing, pero para peace of mind mo, better check with your OB na lang to be sure. Lower abdominal pain na mag-and-go is super common sa first trimester, but if the cramps get really intense or may bleeding, that's when you definitely need to ring your doctor right away. Take care of yourself!