Pregnancy after miscarriage


Hi ok so just out of curiosity is it normal for symptoms to come and go I am currently 6 weeks and 1 day and I had a miscarriage in November and basically the baby had a slow heart rate and then it just stopped I was supposed to be 9 weeks and the baby only measured 6 and I’m terrified it’s going to happen again so that’s why I ask if it’s normal for symptoms like breast tenderness and stuff to go away or has anyone else experienced this?? I haven’t been to the doctor yet just want experiences from other people thank you!!