I've had 3 MC, so I'm super anxious about everything. I had a hysteroscopy last month so this is my first cycle TTC since then. My breasts started hurting at 5 dpo, my first symptom with my 3 pregnancies but never this early. Cramping started 6 dpo, not the "mild" off and on I've read about implantation but constant and almost as bad as period cramps. No spotting. My period is still 6 days away. Has anyone had heavy cramping from implantation for more than 3 days?