Tough Call

[Rookie]

I was working this game by myself, and thought I was doing a pretty good job. Situation: Home team down by 1, about 1:30 to go. I am standing on the side opposite of coaches. Home team attempts to foul the dribbler, on opposite side of court, I'm not sure if I see a foul, so I don't blow my whistle, home team them intentially fouls the next ball handler after the pass. I call intential, the coach goes crazy, telling me that if I had called the first foul, his player would not have had to intenially foul the second guy.

I felt the coach may have had a point so I did not T him up, although in hind sight I should have told him to be quiet, and then tell him that the player did not have to throw the guy on the floor (which after thinking about it should have been a flagrant, but that is neither here not there) My question is, did I goof by not calling the initial contact, even though I was unsure?