Missed periods: If you have missed your periods and feeling like vomiting at intervals then this can be a sign of pregnancy. When sperms reach the egg, menstruation stops and this is a sign of pregnancy. So, keep a track of the monthly dates.
Trying to conceive: When you try to conceive, you expect to see a sign of pregnancy. Unprotected intercourse especially during the ovulation days can make you pregnant easily. Vomiting can make you think that you are pregnant.
Morning sickness: Most of the women face morning sickness which is a sure sign of pregnancy. Often in the morning, if you feel like vomiting then it is a sign of pregnancy. Feeling weak, nausea, dizziness and vomiting sensations are sure signs to prove that you are pregnant.
Headache: If your vomiting sensations are followed by headache and dizziness, it can make you sure of your pregnancy. Mostly, morning sickness and headache are considered as sure symptoms of pregnancy.
Uneasy: A symptom of pregnancy is the uneasy feeling. Getting vomiting sensations after eating food or even after seeing food can be a sign of your pregnancy. Even cramps in the lower abdomen can show that you are pregnant.
If these points or symptoms match with your condition then you might be pregnant. Vomiting or getting such sensations is considered as a sign of conceiving, so go for a pregnancy test to become 100% sure.