Early symptoms and development

Donnell
I am 42 having my 3rd. Other 2 are 17, girl,  and 10, boy. 
With them I didn't not even know I was pregnant until about 8 weeks and felt nothing until about 10-12 weeks. I did not grow any until around 12 weeks. 
With this 3rd one, I have many symptoms starting around 3 weeks. My clothes are getting tight already now at 5 weeks and I feel extremely bloated.  
Is this because I am older now that I feel everything more and am growing faster? 
It has me concerned that the pregnancy will be miserable instead of happy! Or, that something is wrong! 
Trying to stay positive!