Is this normal?

I’m currently 7 weeks 3 days with my little blessing 💖 I’m a young mom of 17 so this is my first time around. Anyways lately I’ve been having some brown discharge and very light red but that was only for about a day . but never more then a panti liner i could probably leave it in a week and it wouldn’t even fill up but anyways since I found out I was pregnant I’ve been having light cramping not all day but it comes and goes. But the brown discharge just started happening I told my doctor and she said it’s normal. But I’m just anxious, currently my only symptoms are going to the bathroom a lot , a lot of motion sickness , I haven’t experienced morning sickness yet. And my boobs are starting to feel a little sore as week as my mood changing fairly easily. I guess I’m just worried I just want to have a healthy pregnancy. I know I’m young but I already love my baby and I know I’m going to do everything I can for my little one.