If I stop taking calcium tablets in the last month...

Calcium in pregnancy :
 a dietary intake of 1200 mg/day of calcium for pregnant women is needed which can be supplied through food or tablets . Stopping calcium in the last month of pregnancy is ok if you don;t suffer from severe hypocalcemia .
What are the sign and symptoms of Pregnancy ?
There are many signs and symptoms which can increase your suspicion of pregnancy , and these include :

1. Delayed period .
2. Nausea and vomiting .
3. Abdominal and low back pain .
4. Breast pain .
5. Changes in appetite .
6. Positive pregnancy tests .

What to do at the moment ?
Take calcium as prescribed by your doctor . If there is no indication for calcium supplementation you should not worry about stopping calcium tablets but you should eat food that contains enough dietary calcium .