<human>: I guess I'll use my situation as a start/an example.

My job title is "hardware test engineer," and I hold a degree in Electrical Engineering. When I first started, my manager asked me what I feel comfortable doing and working on. My main focus in my undergrad was digital circuit design. Honestly, I'm probably more geared towards programming than anything else. I mentioned that anything to do with RF, I would not feel confident in dealing with.  

I was originally put on working on controllers and things of the sort, and I have to develop test plans and determine what sort of testing is needed. A lot of it turns out to be mechanical testing in nature, so I am a bit uncomfortable, but I figured that I could learn enough about that to kind of make it. Plus, there are actual mechanical engineers on the team to help. I was still feeling a bit lost/confused with the job, but stuck with it.  

About half a year after I stared, one of the members of the team takes a position in a different area of the company. His projects were split up among the rest of us, and lo and behold, I am stuck with the RF related stuff. Again, I decide to try to power through it, but I know it would be an uphill battle. I just don't understand it, and I can't comprehend it well.  

Now, I have to go and carry out the actual tests (the original plan was mostly devised by the guy who left before he accepted the new position). I have no idea what I'm doing. This will be the first time I actually do some physical testing (hardware test engineer, don't actually do any testing until I'm a year in). I'm a bit freaked out because once I get to the lab (which is out of state, 8 hours away), I will basically be saying, "I have no idea what the fuck I'm doing." I'm not sure how I'm going to make it through this. I'm stressing over it pretty hard, and the anxiety is getting to me. I guess I'll just see how it plays out and try to roll with the punches as best I can.

Can you summarize the given text in a few sentences?
<bot>: My job stuck me with a project I am not at all comfortable working on, and now I have to do something important and expensive. Dealing with it by freaking out... a lot.