Pregnancy and body

KeiShauna
So I'm a week and 3 days late on my period and I've been havin some pains for awhile haven't taken a pregnancy test but I told my boyfriend and he wants a child and he is excited bit I don't know what else to do scared a lil. can some tell me what I should do or what is going on? I sometimes feel as I have to throw up but don't and it could be cold in my house but I will be completely hot why? I get very light headed at time and have minor pains on my side can someone help?