Have you ever dealt with sacroiliac (SI) joint problems?

I have been having this really uncomfortable, painful lower back issue (im 22 yo). It feels like its in my pelvis area, it radiates in my upper buttocks, & also my upper outter thigh. I was researching these symptoms and found that after childbirth (& other incidents) you can experience that. Im not a big "fan" of the doctor & i was wondering have any of you dealt with that & did it go away or did you see a doctor? Just curious... Thanks in advance 💖