Can we still have sex

my girlfriend is pregnant now she is in the first month and I am just wondering if we still can have sex and will it hurt the baby and will I still be able to come in her will that affect pregnancy in any way and she is not eating much now for the last two weeks she is getting sick every morning and also at night time and feels weak is this normal in the early stages of pregnancy and we have booked an appointment to go see a doctor

Yes you can still have sex for the majority of her pregnancy unless her Dr tells her otherwise! Morning sickness normally last for the first 3 mos., but some girls may get sick during her whole pregnancy! She'll start eating more soon enough! Good Luck!!