Back has seized up help

[BackinBlack24]

my back has seized up this evening , it happened before maybe 4/5 years ago so I know what im
in for but this time I’ve a baby to try look after and I can’t even pick her up . I physically can’t get to my GP they are an hour away and I live very rural. Has anyone any rec for anything I can buy over the counter that would help ? Already taking nurofen. Its not doing much at all

Ibuprofen gel / hot water bottle?

Will start by saying I’m not medically trained.

Is it your lower back?
Try an ice pack. 20 mins on/20 mins off for a couple of hours. Should help if the pain is caused by inflammation or trapped nerve.
Take paracetamol alongside the ibuprofen but time your doses so you’re taking something every couple of hours (so ibuprofen at 8pm, paracetamol at 10pm, ibuprofen at midnight).

I found heat made my bulging disc/femoral nerve pain worse.