Jaimee,
I just saw your post and I must say that we're in the same boat. I had 3 children (13,10,& 2) and 2 miscarriages, and now I'm 9 weeks pregnant. The doctor put me on progesterone right away, but just a warning to you...it can cause some tough side effects. For me, my nausea increased tenfold and I also got diarrhea, dizzy spells, migraines, difficulty sleeping, etc. Make sure your doctor monitors the amount of progesterone in your body, because mine ended up 4 times higher than it should have been, so I finally convinced the dr to take me off it.
I feel like this baby's going to make it now. My dr ran a slew of tests (they call them "repeat aborter" tests) to see if there was an underlying reason why I lost the other pregnancies. They can do them while you're pregnant, too. If you're interested, ask your dr about them. It sure put my mind at ease knowing I did all I could to avoid another miscarriage. My dr also did an ultrasound at 6 weeks to determine if there was a viable pregnancy, and that was reassuring to see the little heart beating away.
Try to think positive thoughts. Remember that if God wants this child in your family, he/she will come. After all, He's really the one in charge.
As for the nausea, my dr gave me a list or remedies to try...eat small amounts of food frequently, keep something in your stomach, eat crackers before getting out of bed (low blood sugar can trigger nausea). Drink plenty of liquids like watered down gatorade, ginger ale, popsicles, etc. Try a cold wash cloth over your eyes when you feel nauseous. Ginger capsules, ginger tea, and ginger ale are safe in small amounts. Try seabands (available for motion sickness in pharmacies) to use the accupressure to counteract nausea (these work for me!). Prepare foods that do not have strong odors, and choose simple foods that do not have to be cooked for long (sometimes smells make people nauseous). Avoid greasy or fried foods. Try drinking peppermint or raspberry leaf tea. Eat a high protein diet. If this doesn't work, try a high carbohydrate diet. Try taking Zantac 150 twice a day (or the generic). Sometimes you have increased stomach acid when you're pregnant. (This helps me a ton!) Last, try taking 1/2 Unisom with 50-100 mg of vitamin B6 at night. This will make you sleepy, so don't drive! (My friend swears by this method!)
Best of luck to you! Try not to let worry load you down but find things to occupy your time and it will pass quickly.