What to do after a rejection

why do you think this is? because of your lnat?

Only RG in Clearing last year for law was Queens Belfast AAA.
Best option if you want choice if RG is to apply grades in hand. Either apply none lnat or study this summer to hopefully get a competitive lnat score this time.

Glasgow rejected me for my lnat which was 19 Edinburgh rejected me due to competitiveness i was rejected from cambridge i dont really know why and i only have aston but i dont really want to go there i aspired to go to a russel group i only put it down because my teachers told me to

What did you put down as your fifth choice? Or did you not have one?

Im waiting for Bristol they are my fifth but because my lnat score is only 19 im doubting they will accept me same way glasgow did.

Apologies, I've just realised that was in your OP but I missed it. Hopefully Bristol accepts you and you can put that as your firm choice (if you'd want to go there), or you can look for a place in Clearing from 5 July.
I know you're not keen on a gap year but you could always look to reapply next year with your grades already achieved (lots of people do this for Oxbridge particularly, it's not unusual). Do note that you would need to write a new personal statement, but TSR's personal statement review service can help with that!