miss carriage?

So my period was due on the 27, I had a lot of of pregnancy sings but had no signs of af until I went horse riding and was doing bareback jumping when I landed awkwardly on the horses wither (a big bone on the end of their neck/start of back)
It was really painful and straight after I had really bad pains in my stomach. Could it be a miscarriage or just coincidence? :)