uncomfortable pregnancies.... bc of age?

All I see every time I check this group is constant complaints about pain and exhaustion and what not. Meanwhile I'm having completely opposite symptoms. I have so much energy and I'm still working non stop (12 hr shifts) 6 days a week. But here's the thing, I'm 23.
Does age have something to do with how much pain and discomfort you go through during pregnancy? Or am I just getting lucky for now? I'll be 35 weeks this Friday.