Help?!

So this past weekend I went to the beach and traveled 8 hours away and 8 hours back. I was there for about 2 days and walked almost 5 miles a day and I don’t usually ever get any exercise other than the usual walking around my house and work. I’ve never had any problems, I don’t have GD or anything like that but ever since I’ve been, my legs, fingers, face, and feet have been swollen every day when I wake up. I have insane itching all over my belly and arms. I have had really bad sciatic nerve pain so I can hardly walk and when I do it hurts so bad I cry and limp. And I’ve been having pain and tightening in my belly on and off everyday. It happens about every 15 mins and lasts 30 sec to a minute. I don’t know what a contraction is bc I’ve never been pregnant before but should I be worried and go in or just deal with it?? I only ask bc I’ve never had any of these problems before now. Thanks in advance. Also I can’t call and ask my midwife bc she told me due to the fact she’s so busy if I’m worried to just go to the ER but I don’t know if it’s worth going just yet or if this is supposed to be Normal?? I’m 34 weeks and 1 day