3rd trimester constipation!!! help!

Hey ladies,
Probably TMI but I need help lol. 
Are any of you having a lot of issues with constipation? If so, have you found anything that worked? I've barely gone to the bathroom in the past week and I am desperate! 
I've been drinking Metamucil, eating fiber cereal, and salads. I drink a large ice water every morning and drink quite a bit of water throughout the day. Yesterday I had a coffee from Starbucks because that used to work. I've also been eating Activia yogurt. I exercise every other day. 
What else can I do?!? Help!