hip joint randomly gives out on one side/leg feels like it goes out from under me

I’m not sure if I’m posting this in the right place, but I’m trying to get some insight into a hip issue I’ve been having since squatting heavy yesterday. The squats themselves concluded without pain, though the did feel noticeably heavy, but a few hours later, I started having severe, short, random bursts of pain in my right hip joint. The pain does not feel muscular; it feels like a problem with the joint. It seems somewhat more likely to happen when I am rotating my leg (turning my toes in or out), but can also just happen randomly when I am standing still. Out of nowhere, I will feel a sharp, intense pain in the hip joint and my right leg feels like it goes completely out from under me/like it can no longer support any weight and will collapse. The pain usually lasts only a few seconds, but my inability to support weight on the leg will last a few minutes. When it goes away, the leg feels fine, until it happens again. It has been happening fairly frequently.

I have never had an issue like this before, though I do seem to have extremely tight hip flexors, tight enough that they seem to be the cause of fairly persistent and noticeable low back tightness (not pain, just tightness); doing things like the pigeon pose stretch that target them seems to loosen up my low back. I do not know that this is related at all, but mention it since both problems involve my hip.

If anyone has any insight, it would be very much appreciated; I’m likely to see a doctor anyway, but want to have some idea, if I can, about what this might be first. Thanks.

I am male, 34 y/o, 250lbs, lifting for about a year and a half, no serious previous injuries or deformities, and was squatting 405 when this happened.

Hey @cairn - sorry to hear about the recent symptoms. How have you been feeling since your OP?

I know it may seem intuitively to think we can ascertain a particular pain symptom meaning a particular tissue problem (joint vs muscle) but this isn’t actually possible - which is a good thing because often we tend to think this subjective feeling is indicative of a “serious” vs “less serious” problem.