U.K. Mums tooth abscess

Hi everyone . I'm 15 weeks pregnant and just been put on antibiotics for a tooth abscess that put me in hospital alongside hyperemesis which was horrific. Now the sickness has calmed down and my abscess has only just come back I managed to get an emergency dentist app yesterday and already feel like utter crap with these tablets ! Constantly throwing up and cant eat a thing. I'm scheduled for a filling on the 15th and then root canal / tooth pulled when baby is born. I need this infection gone but I cannot feel like this for another 5 days !!! Any advice pleAse v