Hello, If you have regular periods, you will miss a period. a home pregnancy test performed 3-7 days later with a fresh early morning sample reads well. Blood test for pregnancy can be done when there is ambiguity and also when an early decision is needed. You can feel tired, sleepy, moody, nauseated, dizzy, have hyper acidity, constipation and increased frequency of bladder. There can be some amount of pressure in the pelvis, cramping pains and heaviness. A clinical evaluation and a trans-vaginal sonogram help to clarify. Hope this helps.