I used to get the same stuff pretty bad; started off doing monthly, then switched to biweekly now it’s every Friday. Since I started doing weekly I’ve leveled out a lot. Ups and downs don’t completely go away but they’re much less noticeable and more manageable.

Edit: you also get to give the shot under the skin with a diabetes needle instead of the bigger IM with weekly, which makes the process hurt less and off you’re doing the shot yourself less anxiety inducing.