Carrot fly? - some flies seen under enviromesh

I built the tunnel with enviromesh over my carrot rows and stupidly did not ensure that all the mesh is secured on the sides  . I found on Saturday a few flies on the inside and I am just feeling very demotivated about it all.
What do you think I should do? Abandon the patch and start again? The carrots have not germinated yet... Any advice gratefully appreciated .

On top of everything I saw today that there are these brown patches on the side of the mesh and it has been ripped (does not looks like it was caused by the bricks though) .

*Edited title as really need help with this...

Carrot flies are quite distinctive with orange-ish legs.

and they are quite small too, so often go unnoticed, so the ones you saw could be anything.

Probably all is well 

and they are quite small too, so often go unnoticed, so the ones you saw could be anything.

Probably all is well 

I am sure all is well now . They were quite big...