Chemistry bonding question

If a molecule doesn't contain lone pairs of electrons is it symmetrical?

In general, you can say with some certainty that any molecule with no lone pairs is symmetrical (the only possible counterexamples I can think of would be the alkali metal hydrides in the gas phase, assuming they form discrete molecules upon boiling).
Bear in mind that there will be some cases where molecules that do have lone pairs end up being symmetrical. XeF4 is a good example, as the xenon atom itself is square planar with two lone pairs (and each fluorine has 3 lone pairs).