Is my nose tip too high after rhinoplasty? 3.5 months post-op (Photo)

At 3.5 months after rhinoplasty most of the changes have occurred and although your tip may drop very slightly it will not drop a great deal. Although your tip is a bit higher than many would consider ideal, it is within the range where it is not obvious.  In any event you need to wait a full year before considering additional surgery.  Fillers to lengthen the nose are not going to make a significant difference without distorting the tip.

This typical after rhinoplasty for the tip to appear shutter than before surgery. However the tip gradually drops down on its own over time. In fact I see I see more revisions for noses that are too long as opposed to too short

HiAs you stated it has been only 3.5 months since surgery. it is too early to be worried about your final results. Your tip is likely to drop. If you had a cumellar  strut placed, it is less likely to drop significantly but still there is so e room downward to let nose tip drop down. It takes at least a year to see final results.  I think at this point you need to wait for your nose to take shape.