I think I've had a miscarriage?

I have recieved my period, but while having my period I've gotten a lot of huge blood clots which I normally don't get on my period, this is the first time in years of getting blood clots.

Also just before getting my period I was recieving pregnancy symptoms such as urning a lot, especially in mornings, and stomach aches, headaches etc.

I am on no contraceptive and trying to get pregnant.