Daven but don’t be a nudge because you might get what you asking for eventhough you’d be better off without it.
Example: See Parshas Toldos – Hashem promised Yitzchok a child but after many years without a child, Yitzchok bagan to overdo it with t’filos(V’yetar Yitzchok La’shem), so Hashem gave in to Yitzchok and children were born ahead of the intended time, by five years. As a result, Avrohom died five years sooner, as he was supposed to live to 180 but died when Eisav went bad, see Rashi.