Ampicillin IV 2g Q6H AND Gentamicin IV 5mg/kg once daily (adjust based on renal function)  
Alternative antibiotic regimens:
Ampicillin-sulbactam IV 2g Q6H
Ticarcillin-clavulanate IV 3.1g Q4H
Cefoxitin IV 2g Q4H
Can only be considered cured with delivery of infected products of conception
After delivery, treat like postpartum endometritis with clindamycin plus gentamycin
Ampicillin-sulbactam IV 2g Q6H
Ticarcillin-clavulanate IV 3.1g Q4H
Cefoxitin IV 2g Q4H
Chorioamnionitis
The same abdominal pain differential as non-pregnant patients, plus:
Septic abortion
Ectopic pregnancy
Postpartum endometritis
First trimester abortion
Preterm labor
Complete abortion