My stomach feels bloated but there's nothing I can do about it.
I feel gassed up but I guess it can't be helped.
ーMy stomach feels bloated but there's nothing I can do about it.
「お腹が張って仕方がない。」
feel bloated で「お腹が張る」という言い方です。
there's nothings I can do about it で「仕方がない」
ーI feel gassed up but I guess it can't be helped.
「お腹が張って仕方がない。」
feel gassed up でも「お腹が張る」と言えます。
it can't be helped で「仕方がない」
ご参考まで!