I have started questioning my gender identity?

I am going to apologize before I start for language errors, English is not my first language, Italian is.

All of my life, I have been raised as a girl and I need advice. I was born female, and sometimes I agree with this. However, there are days (or times in general) when I wake up and feel somehow off when my mother or someone else refers to me as she. At first I blamed it on my really bad day I'd been having, but seeing that it's a progressive happening, I am beginning to doubt so...

I started thinking about my gender identity in a positive way and explored the options (I am lucky enough to be a person who knows a lot about the LGBTQ community, for some reason I do not meet many of these people outside of the internet). So far, this is what I've considered and ruled out:

- Pangender; I got rid of this one because it implies that I would be more than one gender all the time, which isn't true. There are times when I am perfectly okay with being referred to as a girl (because I feel good with that), but there are also times where it just feels extremely out of place. I think if I were pangender, I would not be having as big of an issue with this as I am having.
- Transgender; Like I said earlier this implies that I would be one thing all of the time, which (confusingly enough) isn't true for me.
- Cisgender; If I were very truly happy with the gender I was assigned at birth, would I be having this problem and writing in this forum? I do not think so.

I know there are many more genders out there with names and many that do not have one and shades in between but for the life of me I could not figure it out until I remembered the term genderfluid.

I have a basic understanding of what this is, but I am in need of a better explanation. Can someone who is genderfluid or someone that knows a lot about it explain it to me more clearly? A lot of people have said a lot of things to me about gender and labels and I do not know who to believe.

Also, I am not unfamiliar to coming out to people. I am also bisexual and panromantic (although I like to keep the last one to myself, some people are not as familiar with romantic orientations as sexual orientations, I have noticed). I will not tell my family though; there are people in my familgia that are very good people but are also very conservative (I keep using this term, I hope it is the correct one). I fear that if word were to spread to those people in my family, I could be kicked out of the house or worse, the family even though I know they genuinely do love me very much. My uncle is gay, and I do not know much about his coming out, I do know that it wasn't met with niceness for some people in my family.

Basically this is what I need some help on:

- A clearer explaining of what genderfluid is
- How to be more comfortable with this if I decide it is what I am

Thank you very much, Grazie

I am also sorry for the long post, I tend to ramble in my English.

Ciao for real this time until someone posts