Help! New symptoms, can anyone relate?

Shara

I am currently 16 weeks with twins and the last few days have been just awful: headaches, dizzy spells even though I'm drinking plenty of water, pressure in my pelvis all the time, back pain, and lots of clear odorless discharge. Is this normal?? I thought the 2nd trimester was sposed to be the best!? Are these normal symptoms or am I being paranoid...😖