Dear mizz bee,
it is a little hard to judge if you are pregnant or not, if you are only experiencing nausea and vomiting, as these are common in flu, virus and gastro aswell, which we will all suffer at some stage of our lives. If however, you had sore or tender breasts, sensitive nipples, tiredness aswell as frequent urination then you could possibly suspect you may be pregnant. The fact that you don't have a period means that you are not ovulating either, or releasing an egg to be fertilised. If you suspect you are 3 months pregnant and did a home pregnancy test now, you would get a very accurate result. It is worth taking a pregnancy test if you are absolutely convinced you may be pregnant, even if it is just to give you peace of mind.
Good luck....
.::suzy::.