Hey I came across this pic (not mine, i think it was in the "gender opposites" thread of this forum from ages ago) and I can't help but think the first shot looks almost exactly like yours. These 2 pics were from the same baby, in the same ultrasound session. First one due to angle it caught the 3 lines but after moving the wand a little they got a clear boy shot.
Of course every baby is different, but looks like yours has a good chance to turn out a boy. Congrats!