You need an MRI. Even with that, you need to work with an ortho specialist.
Was your injury due to contact or a non-contact injury? That can make a big difference. The fact that you have ongoing pain is not a good sign. In my case, I had little swelling after a few weeks and never had pain after the associated MCL strain healed without medical intervention. That took about six weeks. I had a tear in the outer (thicker) edge of the meniscus as well, which could also heal on it's own. That took more like six months.
In recent years, a lot of medical research is being done to determine what makes it more likely that someone can be a true coper. Obviously not doing surgery saves money overall. Plus the recovery and rehab period is shorter. While ACL reconstruction works quite well, assuming good rehab for the year afterwards, there are potential disadvantages as well. In some cases, it makes sense to delay surgery to build strength or to allow the option of avoiding surgery.
Earlier this year, Dr. Marx reported on a study about recreational skiers based on follow up with patients who opted not to have early surgery. The conclusion of the study was that it's possible for ACL injuries to heal in 6-12 weeks. However, it makes a big difference what other injuries happened at the same time.