It's been 4 days since I've found out. I haven't eaten. I keep throwing up. I'm nausea, I'm tired, stressed and it is because I can't stop thinking about how quickly he replaced me. I just feel like I didn't mean anything to him and he meant the world to me.
I want to move on. I want to stop feeling ill and get on with my life.

It's going to take more than four days to get back on your feet after what you just found out. Please be gentle and compassionate with yourself as you go through this healing process. I know it hurts...it will take time. Stay busy if you can and when thoughts come let them. You need to process this...not hold it in. I hope you heal quickly and get back on your feet soon.