I am 9 weeks today and having the same issue. Not only am I eating almost constantly in order to avoid the nausea but I am grossed out by almost everything healthy! This is my second pregnancy and with my daughter I ate a lot but I ate salad, veggies, etc. I only gained 15 pounds that entire pregnancy. This one has been completely different all I want is junk food and I want it CONSTANTLY. LOL!!
I have been able to tolerate fruits and crackers so I've been buying whole wheat, light crackers. I guess the trick is to find something (anything) that you can eat a lot of and that's not too unhealthy. Light cottage cheese and apple sauce have helped me too but you really need to see what works for YOU.
My morning Protein drink has been lasting at least 3 hours. Maybe you could try it, its Protein powder (vanilla or carnation vanilla works too), some Peanut Butter, half a banana, low fat milk and some ice. This morning it lasted about 4 hours which was a big help.
As far as the unfill, I can't help you there. I had a complete unfill at 6 weeks because as soon as I got pregnant I became unbearably tight and could barely drink Water. I went to my surgeon for them to take some out and turns out it was their policy that for pregnancy they take ALL of it. It has helped me feel a lot better though so I can't complain.
My big fear is gaining a ton of weight with this pregnancy!! I hope that once we are past the 1st trimester this crazy nausea will pass and we will be able to eat more like normal people.