I have a 2018 MacBook Pro with 4 USB C connectors. I tried using this USB C Adaptor that connected 2 HDMI and it didnt work only connected 1. So now I have 2 separate connectors and work fine. I want to add a 3rd monitor but cant sacrifice another connector for it. What are some good options I have so I can connect 3 total external monitors? Thanks for any help at all.