Myalgia refers to muscle pain. The pain may be localized, as in a muscle strain or crush injury, or generalized pain caused by an underlying disease such as a viral infection. The most common type of localized muscle pain is caused by muscle overuse or injury from strenuous activity. Myositis refers to muscle inflammation.
Nausea or morning sickness is a classic pregnancy sign that you can notice in the early stages. It will afflict in the initial weeks of missed period even before your pregnancy is confirmed. You will feel dizzy, weak, and may want to throw up at times.
Symptoms typically develop around the sixth week of pregnancy. This is about two weeks after a missed period if you have regular periods. However, symptoms may develop at any time between 4 and 10 weeks of pregnancy. You may not be aware that you are pregnant. For example, your periods may not be regular, or you may be using contraception and not realise it has failed.