morning sickness blues

Jennifer
Hey guys 
First post so hi everyone!!!
I'm 14wks3days and 4days started feeling really good after what has felt like the equivalent of a 3month hangover not eating full meals mainly beige food and even then atleast one mea a day being rejected. 
On top of that been dealing with post nasal drip too which is vile!
Anyway 4days ago woke up feeling great and not repulsed by all foods having vegetables, fruit regular sized meals and feeling still great on a full stomach. 
However back in work today after long bank holiday weekend not feeling my best and instantly said goodbye to my plain lunch, I thought that stage was over?!?!
Is that normal?