Cramping and spotting.

Ji
I'd like to hear from women who have either made it to their third trimester or have had a successful delivery after spotting in their first trimester. I'm only 4 1/2 weeks and this is my first pregnancy. I'm spotting and cramping. Dr. says it's normal, but I'm starting to worry. Anyone outthere experienced this early on too but went on to have a healthy continued pregnancy? Thank you!