I'm 10+4, and since 5 weeks, have had nausea which has worsened every week to this point. Since yesterday I have never felt so horrendous. I started uncontrollably vomiting/wretching at 8pm last night. Went to bed, woke up several times with nausea but managed to not vomit. Then at 8am this morning, vomiting yellow bile. Tried a banana for breakfast but it came back up an hour or so later. I have tried drinking water but it has the same effect. Basically I don't know how long this should go on for before I contact the hospital? I Haven't been able to keep food or liquid down in over 12 hours now and no sign of it getting any better