You must not use Scotts Weed and Feed formulation now for two reasons - one, you've already applied a weedkiller to the entire lawn, and one of the active ingredients, 2,4D, is present in both formulations, which means you'll be overdosing on the weedkiller front. Second, where you live, your first frost date is early October, so feed should not be applied this late in the year. If you finish up with bald patches, you can reseed those this year, you've just about got time - you must wait for three weeks after applying the Ortho B Gon.
There are 'autumn' (presumably labelled 'fall' where you are) feed preparations for lawns available in the UK, not sure about where you are, but they're designed to release low levels of nutrients for six months and do not contain any weedkiller. This treatment will not, however, 'push out' weeds - that claim is based on the idea that the weedkiller content in the Scotts Weed and Feed product will kill off the weeds, and the feed will increase the growth rate of the grass, so that its more likely to fill in any bald patches. In reality, if the bald patches are over 6 inches in size, re-seeding is usually necessary.
I wouldn't recommend using an autumn feed product if you are going to reseed some areas - best wait till late spring and use the Scotts Weed and Feed then instead, because the new seed will have been down long enough to withstand it.
If you feel it would be valuable, you could take a risk and apply a liquid Lawn Food immediately (something like Scotts Liquid Turf Builder), but it does mean walking over the lawn again - it's also dependent on what type of grass you've got as to whether this is a good thing to do at this time of year, but ensure that, if you do this, what you buy is simply a liquid lawn fertilizer, without any weedkillers or other treatments included. Liquids tend to feed instantly with a shorter term residual effect, when compared with granular formulations; these latter wouldn't be appropriate at this time of year.