Worried at 21 weeks

Hi, mommies. Magtanong lang sana if normal bang may return ng fatigue, nausea, at appetite loss sa 2nd trimester. Nawala na ito lahat nung first trimester ko pero sobrang nahirapan akong bumangon at kumain today. May check-up ako tomorrow pero I'm worried. May mga naka-experience pa ba ng ganito around 21 weeks?