Tisha B’Av is a stringent fast and everyone needs to fast including pregnant and nursing mothers. 

Therefore, 

• Someone who is sick (in bed) or elderly and fasting is detrimental to their health does not need to fast. 
• A woman that gave birth within 30 days does not need to fast. 
• A pregnant/nursing woman who feels unwell (faint or weak) should break her fast (it is advisable to drink something that has a high sugar content).  
• A nursing mother whose child only nurses (does not have formula) and is afraid that she will not have enough milk may drink/eat with shiurim (she may drink a sip of juice [1-2 ounces] preferably every 4 minutes. If that is not enough, she may drink more frequently (and more). She may eat around an ounce preferably every 4 minutes.). 
• It is advisable to express milk before the fast and give it to the baby in a bottle on Tisha B’Av. 
• If this is too difficult, she may eat/drink normally. 
• The following are considered sick and do not need to fast, someone who is diabetic, has a heart condition, undergoing chemotherapy, had an operation (hernia etc…). 
• If you are not sure if you need to fast you should ask a Shailo (if you should not fast, you are not doing a Mitzva to fast). 

Someone who is not fasting should wait till the morning to eat/drink (if they can). 

• Before eating or drinking if you are not fasting you must make Havdalah.
• You need only make Havdalah if you are eating more than a shiur, if you are eating Shiurim you do not need to make Havdalah. 
• You may make Havdalah on grape juice or Chamar Medinah. 
• The person that is eating should make Havdalah.  
• Even though usually women don’t drink from the Havdalah grape juice, since she is making Havdalah she should drink it. 
• When making Havdalah if you making it Motzei Shabbos you do not say Hineh…. and you do not make the Brocha on Bsomim.
• You should just say the Brochos, Boreh Pri H’Gofen and Hamavdil  ((to say Boreh Moerai H’aish depends on your Minhag if women are obligated to make a Brocha on the fire).

• You may not wear leather shoes/slippers, all other footwear you may wear.
• You may wear footwear that has a design of leather on it.
• Someone who needs to wear special shoes and will be in pain without them may wear them on Tisha B’Av.
• You may sit on a chair that is lower than 12″ (30 cm.).
• An elderly person or a pregnant woman may sit on a normal chair if it is too difficult for them to sit on a low chair.
• You may not sit on a bed.
• Some have a Minhag to sleep without a pillow or if you sleep with two pillows to sleep with one.
• Someone who is permitted to eat should wash their whole hand when washing for bread (as they do the entire year).
• You may not wash with hot or cold water even just one finger.
• You may wash your hands with soap after going to the bathroom if you always do. 
• The same applies if you always wash your hands with soap before handling food.
• You may also wash your hands if they are dirty (The rule is, you may wash your hands, not for enjoyment).
• Women may not put on makeup, lipstick, etc.. [Newly married (less than 30 days) are allowed to].
• You are permitted to use deodorant or antiperspirant.  You may use Purell on Tisha B’Av .