Early pregnancy signs?

My back is killing me. I can’t get comfortable trying to sleep. I am tired but have major insomnia now. Emotional. Boobs feel like they’re stretching. Lower abdomen feels funny weight and light pressure. Super hot easy. Earlier I got dizzy after sitting outside a gas station because I could smell the grease from their fried food inside my car, with all the windows up. I about puked when my husband came back in our vehicle. Super tired.