Symptoms

Is it normal for symptoms to come and go? I’m 5.5 weeks pregnant and woke up to my boobs not hurting today. They had hurt since about 5 weeks or a little before. Is this normal? It’s about the only symptom I have so I’m a little worried. I just had a blood HCG yesterday though and it looked great. I’ve had 3 miscarriages so I’m very worried about this baby. Please let me know if this is normal! Thank you.