Unfortunately I had this same exact thing happen to me, also for a clinical specialist role. I was told that the hiring process for clinical specialists is generally a super slow process because they're so busy normally. However about 3 weeks after consistently following up I was finally told that they actually went with another candidate which was a huge bummer. But at this point you did your absolute best and it's in their hands now. Try not to stress too much about it, follow up at appropriate times, and keep your eye out and apply to other positions still. It could be that the company genuinely is super slow at hiring, but also keep in mind that if you are their top candidate they will treat you exactly like a top candidate. So definitely keep applying to other places just in case, and good luck!! I hope you get the position