RhoGam if Rh Negative
Based off of Level C recommendation from ACOG for threatened abortion (risk of alloimmunization is low, but consequences can be significant). Specifically state it should be considered. Best course of action is to discuss this with your hospital's OB team, most will recommend it.
IVF and/or PRBCs if severe bleeding
Misoprostol only for < 12 weeks gestation: give 800mcg vaginally, dose can be repeated once within 7 days if no response 
If available, mifepristone 200mg PO should be given 24 hours prior to first dose of misoprostol (NNT = 6)
Supportive care with anti-emetic and NSAIDs for misoprostol side effects
D&C and OB/gyn consult may be necessary if medical management fails or continuous products/vaginal bleeding > 7-14 days
Based off of Level C recommendation from ACOG for threatened abortion (risk of alloimmunization is low, but consequences can be significant). Specifically state it should be considered. Best course of action is to discuss this with your hospital's OB team, most will recommend it.
If available, mifepristone 200mg PO should be given 24 hours prior to first dose of misoprostol (NNT = 6)
Supportive care with anti-emetic and NSAIDs for misoprostol side effects
First trimester abortion
Ectopic pregnancy
Comorbid diseases in pregnancy
Subchorionic hematoma
Vaginal bleeding in pregnancy 
First Trimester Abortion
Abdominal pain in pregnancy
Complete Abortion