I just had a baby 3 weeks ago and I have been having sex now I'm getting cramping and a brownidh discharge after that it goes to a orange discharge could I be pregnant again I want to have another one

If you had a vaginal delivery you are most likely experiencing this because it's too early for you to be engaging in intercourse. Dr's orders are usually to refrain from sex for as long as 6 weeks so that your cervix and uterus can properly heal.

I understand you want to have another child, but it's best to wait a year for your body to fully recover physically and hormonally.

Yes, way to eary to be having sex, had you not talked to your doctor at all about this.
You can do more harm at this point more than anything

Thanks for the help