I know it can be frustrating but I think that you should try to stay positive! Having your first lucid dream is a big step that you have already accomplished, you should be proud of yourself.

I think that our state of mind can greatly influence our success in dreaming, so a little positivity can really help you out when you're feeling down on yourself and losing hope. Remember that you are magnificent and that you can totally lucid dream, you already have.

I think that some positive affirmations/mantras could potentially help you a lot to get over this hurdle. You can do it, I believe in you!