Extremely bad morning sickness

Hi guyz

I m pregnant about 7-8 weeks (not exactly sure just going with the app as didn’t have a scan yet ) I have extremely bad morning sickness which lasts all day everyday 24/7 I can’t eat or drink all I feel is sick sick sick I m fed up and I m on this medicine called Cyclizine Hydrochloride 50mg which I take but still feel the same . This is my third pregnancy I have a boy and a girl with boy I had mild sickness normal appetite and with girl I had mild sickness normal appetite very very rarely get like vomiting . This time I feel terrible Any idea what is happening ? Would like to know your opinion or experience anything

Thank you