Feeling guilty about food anyone else struggling??

Really struggling with food and eating well. Around 6 and a half weeks and had a week of sickness previous which seems to have eased off but not I'm constantly phlegmy... gagging when cleaning teeth etc and just don't want to eat anything except from toast all the time and tea... even struggling with water whereas before drank it a lot first couple of weeks of finding out. Feel awful like I'm harming my baby and not helping matters but don't know what to do...anyone else had all this??