I would go back to the midwife asap. You have a myriad of symptoms that could show high blood pressure or some sign of infection. I dont want to worry you but I think it's best that you get checked out straight away. If you are worried about them being busy write a list, go in there and say I have a list of things I am worried about and then go on to read them. They shouldnt be fobbing you off. All the best, goodluck.
Let us know how you go.

Love