pregancy wieght HELP!! not getting bigger

davosha

im 23 years old before pregancy i weighed 165 now im down to 148 and i been stedy at this weight for last 2 months very worried im 18 weeks and 5 days im scared no one to talk to help any ideas doctors said i need to be ganing weight im eating just not keeping it down i can only eat ice cream without vomiting i have no bump nothing