Weight loss?

serene • Mom to a Baby boy 💕
I'm about 11 weeks and had very bad nausea usually lasting till late evening. Even a sip of water has me running to the bathroom to vomit. Any who my weight back during week 5 was 133lbs. Now after the uncontrolled throwing up I'm 124. Is this normal or should I be concerned? 
Btw: I stopped taking my prenatal vitamins since week 6 because I always vomit after, even though i tried different ones.