No as long as you've healed (usually 2-3 weeks), feel fine and are protecting yourself from future pregnancies and STDs by using birth control and condoms.
If unprotected you are risking pregnancy since you are highly fertile after until the hormones have settled and there is also risk for infection. The uterus lining has been shed so it's kind of like...
4 weeks to heal so after that. It's easier to get infections during this time so nothing should be inserted (tampons, penises) and no baths are allowed, only showers.