I'd also like to preface that I come from a school and Year level which is quite different to yours, and a lot of others.
This kind of stuff is common among other schools (along with even worse things), and it's starting to come up in our school too. I truly believe that, in my school, 2006 is the cutoff date for being not being completely fucked up, we're leaving at just the right moment.
With that context in mind, I speak through what may be somewhat different to your past and future experiences.
TLDR: Keep going, something will change.I believe you are in Year-9? If so, it's a lot harder to deal with now than it is once you enter senior school, since you have a main form group / classroom you're stuck to. Year-10 is where you choose your own subjects, so the chances of meeting these people constantly become quite slim. A big reason that you're suffering this much might be because of your locker location, I'm not sure about your school but in mine we switch out our locker bays in the following year. So, for the bare minimum, just try and hold out until the end of the year. Eventually, you'll be at the end of Year-12 and you'll never see these people ever again in your entire life.
I did have a similar situation to you, I was never
bullied per se, but there was this one guy who would really get on my nerves. Whenever he'd try and interact with me (of which was always to push me around or make fun of me), I'd also get nervous just like you. I got my confidence by branching out and making friends, the more friends I made the less I cared about the words which came my way. They didn't have to be true friends, just acquaintances that I talked to here and there. I think you should give my route a shot, always be with your mates so they feel less confident in trying to bully you, it's hard to single someone out if they're with a group. You'll get some confidence this way too.
Also, I'm not sure if this is going to ease your nerves or make it worse, but you've got a whole 6 more months (or more) of this shit to put up with. Maybe looking at the bigger picture often might help in realizing that sweating over it every Sunday isn't going to help. Obviously it's okay if it doesn't work, not everyone can just get comfortable with uncomfortable situations overnight.
Thug it out, as you said.
This biggest roadblock here is that they're girls. You can't do anything to get girls to shut the fuck up without being piled on by other classmates and staff. They always get special treatment in these cases and those girls are probably well aware.
At the same time, girls are strange. They only make fun of people who are nice, I don't see them making fun of people who get angered easily. Not suggesting anything here, I'm not liable for anything you do, but if it does give you ideas to change your behavior... well.
I realise now that my whole yarn was a big essay of nothing, but the most important takeaway here is to thug it out, and...