Is this uti or pms/preg related?

I’m getting over a UTI - I no longer have burning when I use the bathroom or the urge to go.

My back hurts and pressure somewhere down there though.

I’m 6 dpo (maybe a day or 2 off). I usually get backaches around 8 dpo but I’m wondering if you guys think this is uti related even tho it feels like I’m almost over it, or something else?