zofran not working anymore?!

so my prescription is to be taken every 8 hours but the past few days i’ve needed to take it every 4-6, and i took one a few hours ago and feel like i’m going to puke. they diagnosed me with HG, and since i started taking zofran it helped A LOT. but i’ve been on it for about 2 weeks and seems to be failing me. last night i couldn’t sleep, kept waking up so hot thinking i was going to be sick. it’s an 8mg script, so for women who it started not to work for... did your doctor prescribe a higher dose? different medication all together? did it work?! i’m nearing 14 weeks and was so happy to have gotten some relief lately 😩

was taking B6 (25mg 2x a day) and was sort of helping, but stopped taking it weeks ago because i just kept getting so sick, and then they got me the zofran.