Sudden tiredness could be due to the increasing levels of the hormone progesterone. You may feel like going to bed sooner, or find it harder than usual to get out of bed in the morning.

Simple chores can leave you feeling utterly exhausted. Dr Mamta Jha, General Practioner says, "Your body is working tremendously hard during the earlier days of your pregnancy, so feeling tired is natural. In addition, your body produces more blood to carry nutrients to the baby."

This causes more work for your heart and other organs. All of this change is stressful for your body and may lead to fatigue.

Time of appearance - 1 -6 weeks after conception

Other causes - Stress, exhaustion, depression, or other illnesses can also leave you feeling tired or fatigued.

5. Nausea, with or without vomiting

Morning sickness usually appears 2-7 weeks after conception. Also, morning sickness doesn't necessarily occur in the morning.

You may feel nauseous at any time of day, especially when your stomach is empty. Some women find that they have an enhanced sense of smell and become more sensitive to odour.

Time of appearance - 2 - 8 weeks after conception

Other causes - Food poisonining, emotional stress, infection other stomach disorders can also cause you to feel queasy.

Also Read: Is Your Kitchen Safe?

6. Frequent urination

As early as two weeks after conception, you might find yourself making numerous trips to the bathroom.

"The amount of blood in your body increases dramatically when you get pregnant, which leads to a lot of extra fluid getting processed through your kidneys and ending up in your bladder. Also, as your uterus beings to rise up into the abdomen, the pressure of your growing uterus may cause your bladder to send the message that it's full even when it's almost empty," says Dr Jha.

Time of appearance - 6 - 8 weeks after conception

Other causes - Urinary tract infection, diabetes, increasing liquid intake or taking excessive diuretics (coffee, tea and colas).

7. Headaches and backaches

Headaches may accompany pregnancy. Headaches could be due to the increase of hormones in the body.

"During the first trimester, headaches may be caused by changes in your hormone levels and an increase in blood volume and circulation. Some women may have migraine headaches for the first time in early pregnancy. The backache symptom of pregnancy is very common to most pregnant women as there is an extra stress on the spine because of the growing baby," says Dr Kulkarni.

Time of appearance -You may have occasional headaches now and then. Back pain will stay constant during the entire pregnancy.

Other causes - Caffeine withdrawal, dehydration, eyestrain, hunger, and low blood sugar may cause headaches. Impending menstruation, stress other back problems can cause backaches.

Also Read: The Best Mattress for Your Back?