Weird pain, just want some advice

I am going to call the doctor but always find advice from you ladies reassuring and sometimes more helpful which is why I'm posting. I'm exactly 33 weeks today and haven't been feeling well since I woke up. I had a bad headache and backache and just felt lousy. About 2 hours ago I started having random cramping pains in my bump. They are mainly on the left side and lower area. I know it's not contractions since the pain isn't all over and isn't unbearable (it's about a 4-5 on a scale of 10). Could it just be dehydration or should I be more worried? I'm laying down and drinking lots of water in hopes of that helping.