Congratulations on your new baby! These symptoms are common after childbirth and often point to dehydration, hormonal changes, or mild nutritional deficiencies. For immediate relief, apply pure petroleum jelly to hydrate your lips. The cracked corners of your mouth (angular cheilitis) may benefit from a thin layer of over-the-counter hydrocortisone or an antifungal cream like miconazole, as saliva can trap moisture and cause minor infections. Additionally, continuing your prenatal vitamins or taking a Vitamin B-complex and iron supplement can promote healing. Ensure you stay well-hydrated, and please consult your doctor or OB-GYN to ensure these supplements are safe for you, especially if you are breastfeeding.