Is paracetamol safe for pregnant women?

Yes! Consult your MD. Paracetamol is another name for acetaminohen ( trade name *tylenol). It is can be used for minor aches, headaches and other minor pain during pregnancy. The manufacturers suggest it can be used for intermittent short durations. As always consult your md before taking any medication as she/he may have other suggestions.
Yes. The same cautions apply as for a non-pregnant person. Pay attention to dosing to avoid taking too much. Avoid it if you have liver problems. As with every over the counter medicine, if you need it for more than a few days, check with your doctor.