Am I monolingual?

I grew up hearing Thai all my life but rarely ever spoke it because I was too shy so now I understand a lot of general conversations and have an idea what people are talking about but it is difficult for me to speak. I was in Thailand and surprisingly picked up a lot of new words and my grammar improved in just a couple weeks.
I also took Spanish in high school and college, I know enough to get around and have conversation but again it takes me a while to think to put words together or I’ll have to look up a word. Unlike Thai, it’s harder for me to listen and understand a native. During the stay-at-home order, I’ve been teaching myself more advanced Spanish like preterite, imperfect, present, direct and indirect objects, etc. So now I know how to put this together but I’m slow.

Long story short, I’m conversational but I am not fluent.