That is literally impossible. The only way the democrats can win the House is if Hillary wins by a wide margin, bigger than Obama's 2012 margin which wasn't nearly enough to give him back the House.
Reagan won twice and never had the House !
Conservatives will vote for Trump. Why should they vote for those Republican creeps who become de facto Democrats as soon as they are safely elected? It is not as if folks expect anything different any more. If Ryan doesn’t suprprise the hell out of me and do good conservative work there won’t be more than a dozen Representatives that will be worth voting for. If the Congressional republicans continue as the are I expect a large majority of Democrat Representatives and 65 Senators to face the new President whoever he may be.