Intermittent Connectivity

I've been having a connectivity issue now for many weeks and keep hoping it'll get better, but it seems like it's getting worse (I'm losing connection multiple times per hour). When I ask the system if there are outages it always says, no. I have reset my router multiple times, and I'm having an issue with my wifi signal and ethernet hardwire connection.  Do you think this is a router issue? If so, can I swing by the Comcast store and swap out routers, or will this require a technician?