6 and a half weeks after miscarriage

It is six and a half weeks after my miscarriage and i was feeling fine up until four or five days ago when i got my first period since the MC ever, ny period has since ended but ever since it came back i have felt really horrible physically like its hars to explain how i really feel but i have episodes where im cold but break out in sweats my head feels weird like pressure it becomes hard to keep my eyes open ill start to feel really nauseous...and then it goes away and come back a couple hours later and ive been dealing with it fir four or five days now. Anyone else experience this??