concerned, advice please

This is my second pregnancy and it's completely different from my first, currently I have headaches everyday basically a constant headache only thing that sorta helps is Gatorade (not even water helps and I drink plenty of water alongside Gatorade) my legs (calves, ankles and feet) swell up so bad that it starts to hurt. I have times where if stand or sit for too long I get this intense pain in my butt cheeks, and lower back to the point that if I go from standing to sitting I have to have someone help me up cause I can't put pressure on myself to get up due to the immense pain it causes, and I get this pain only in my left shoulder that creeps to my neck/ upper left back area to where I can't lift my arm or really do anything with it. Didn't start happening till being pregnant and it's only gotten worse. I have a Dr. Appointment on the 27th should I wait to voice my concerns till then or should I call and see if I can go in sooner?