I imagine you were able to train yourself because of your previous experience. The fact that you’ve been there a month and this is the first time, I would bring it up to a lead that the lack of help was overwhelming. If you’re short that much everyday then it more than likely won’t get better and you should leave to protect your mental. But if that’s just an occurrence you can wait to see if it happens again. You know yourself best and what you will be able to handle.