You can get co-codamol over the counter which has 7/8mg of codeine I believe. I got prescribed co-dydramol for severe headaches and pain under my ribs, which has 10mg of codeine.
I have read that you do need to be careful about taking codeine in your third trimester, but my gp and mw have both said it's fine for me to take it as I've been assessed and am being checked regularly.
Can you get in with a gp to get something prescribed?
You can definitely take codiene - OTC tablets contain 8mg each so a full dose of two would be 16mg of codiene (1g paracetamol). Your GP can prescribe 30mg of codiene if you need more. Be warned though, it bungs you up (trust me, I know from experience) so keep hydrated and take probiotics! Is the access being treated?
Yes you can take codeine, I'm also on co-d for long term PGP. If you need to take it late in pregnancy take it but tell your MW or obstetrician because they need to give baby an antidote after birth. My doctor said it was something to weigh up against my pain and that pain management was more important, the antidote is nothing.