You need to make an appointment with a lawyer. You are under F1, that's your status and eb2 is not a visa or status. Therefore you need to ask permission to your institution to travel or do others things to don't lose your status. As soon as you have your receipt for the 485, you are protected and can leave your institution (but not the country, for that you also need the i-131), but that's very risky. Speak with a lawyer

when you apply for EB2, you change your intention. So if you travel with non immigration visa, it may be set as case abandoned. In order to travel during the application process, you need to apply I-131

Even though its pending you are already in the system so I suggest to stay until you have your AP