Why would you bleed during foreplay?
Would it be something to worry about?

No std's recently been checked
Had smear 3 months ago came back clear
Not pregnant

Started logynon four days ago after 7 day break from another brand,period stopped
The day I started logynon and had no bleeding until now
Was just foreplay no sex at all

If by foreplay you mean his finger inside you, it could be that his fingernail is cutting you.