One side painful

We are 9w+3d into our breastfeeding journey and it's been difficult to say the least. I had a lot of pain and tears at the start but around week 3/4, it all seemed to settle down for the most part minus a flare up of psoriasis and a small thrush episode. I've noticed the past few days that my baby is making a loud suckling noise at times, almost like a cartoon noise of a baby sucking on a dummy. Today, I've had a lot of pain in my left side when she's latching on for the first minute or so and then it settles down. There's no pain on my right and I can't see any obvious reasons (no blocked milk duct etc that I can see). Does anybody have any ideas what might be causing this and how I can fix it? I do have psoriasis quite bad around that area so I'm really hoping it's not that as a major flare up caused my breastfeeding journey with my middle child to end only 4 weeks in (I was at risk of severe bacterial infection) and I don't want that to happen again 😩