logged into btc for the first time since january and someone made a transaction on my acc for all of my btc last month. is there anything i can do to potentially get it back or is it gone?
This is so sad to read OP, you should have been more careful with the device where your btc was stored and trusted less friends. Unfortunately your bitcoin is long gone and nothing can be done to get it back. One thing seems certain though that the person who did it is most likely someone you are very familiar with, someone you informed that you were into crypto currency, trust and usually let your guard down to. That is another reason to be careful of the people you tell that you are a bitcoin hodler and watch the company you keep.
OP yo didn't give us the value of the bitcoins you lost, but I presume regardless that since you were not paying so much attention to your bitcoins and it took you a while to find out that your coins had gone, if it is not inexperience in the field, then it sends a message that you have another source of income and can bounce back from this temporary setback on your investment. But in the future OP, be more careful.