Throw “acromioclavicular joint test” into Youtube and see if you test positive for AC injury. IF these tests aren’t positive it’s worth considering differential diagnoses such as labral tears and subluxations/dislocations and seeking professional advice.
There are several ligaments that may potentially be involved and each of these may be partially or fully disrupted resulting in varying presentations (disability, instability, deformity, pain etc.) and differing in recovery/rehab time.
Doesn’t sound very bad by your description tho if you still have concerns a physical therapist if probably the way to go. A low grade/type 1 AC injury with ligaments intact tho sprained won’t be seen on radiograph.
Recovery time can vary between 2-8 weeks to return to activity for low grade sprains managed conservatively (without surgery). Think of it like an ankle sprain in terms of rehab.
It may be annoying to be injured but there’s still plenty you can do e.g. focus on what you can do and come back conditioned as fuck or take advantage of the mobility work inherent in the rehab and come back more mobile than before.