24 weeks - help!

My pregnancy has been low risk and pretty plain sailing so far... But today I've felt extremely odd... nausea, dizziness, decreased appetite, breathlessness and mild headache and pretty drowsy. Baby has been active today so not overly concerned with her... I'm going to see a DR tomorrow but just wondered if anyone knows if this is normal, or the beginnings of something else?... I stupidly googled and preeclampsia came up so now I'm freaking out 😣

☹️ I just don't feel right!!!