Starting all over

Me and my s/o started ttc last December but due to work changes and moving we’ve had to stop actually tracking but we’ve still been bd without any protection tbh we’ve kinda given up on the whole baby thing because it’s been so long and nothing has happened I’m 19 hes 21 there should be no issues with conceiving I don’t understand it’s honestly so frustrating I’ve been to the obgyn there’s nothing wrong that they see so I’m not sure what the deal is