25 weeks pregnant di/di twins shortness of breath and light headed

Good afternoon, so I'm 25 weeks pregnant with boy/girl twins. Lately I have felt pretty bad and just wanted to know if it's normal..so my back has been hurting really bad, I work in an office setting and it's like sitting so much hurts my back and my ribs soooo bad already. My hands and feet have been swollen pretty much consistent for the last week. My body hurts especially when I get up in the middle of the night or in the morning..it's like it hurts to put weight on my hips, legs, and feet...and to top everything off I have these dizzy spells where I can't breathe and I start to panick and it all kinda turns in to a panicked attack...plus I keep having emotional break downs like what I would always picture an anxiety attack to feel like and I have been very very irritable...

This may all be normal but I just wanted some reassurance i guess...thank you ladies in advance