Has anyone else gotten really sick in their third trimester??

I’m 34 weeks and last week I started to get really sick. Nausea, headaches, dizziness, hot flashes and feeling overheated, feeling like I’m going to pass out...

I’ve called the on call after hours twice now since last Tuesday and all they keep telling me is it might be blood sugar, I’m not eating enough, I’m not drinking enough and blah blah... which I don’t believe is the case and it’s been ongoing for 8 days now. I feel super scared and like I’m not being taken seriously 😞😞

But I also don’t know if this is just a normal pregnancy thing?