4-5 weeks and Dr says most pregnancies are lost this early?

Hi,
Welcome to ehealthforum,
If pregnancy has been confirmed, consider getting serial HCG levels estimated. Doubling up of the hormone levels in 48-72 hours will show that pregnancy is going on smoothly. If levels are not adequate, then external hormonal supplements would be considered to be started to help you in preventing miscarriage/threatened abortion. An early ultrasound scan done will help to know if pregnancy is intrauterine or ectopic along with confirmation of gestational age and viability (early ultrasound scans usually detect fetal pole and heartbeat clearly around 6-8 weeks of gestation). Look out for danger signs like increase in intensity of abdominal cramps, increasing back pain, fresh bleeding/spotting etc. Be in regular monitoring and follow-up with your treating doctor/gynecologist and report any new/abnormal symptoms immediately. Avoid lifting any heavy weights and avoid heavy work. Avoid standing for long durations and avoid climbing stairs. Take adequate rest. Drink plenty of water. Avoid use of caffeinated and carbonated beverages.
Take care.