20weeks into pregnancy, and still feeding DS (12months). I don't want to wean him, but some days my poor boobs just can't handle the pain Okay, well maybe they can, but I can't

I have checked his attachment and it is really good. He gets a good mouth of boob and 99.9% of the time doesn't bite. I have no obvious nipple problems (cracked/bleeding/blisters) but the pain seems to come through the boob itself, almost like a blocked duct being drawn out and it is REALLY painful. Sometimes it can last the whole feed, sometimes the first couple of minutes, sometimes not at all I am starting to dread feeds because of the pain

I have also noticed they are super sensitive to the cold and go a nice shade of deep purple. Walking through the supermarket cold sections is a nightmare and I have to hold my boobs to try and relieve the discomfort and getting in the shower is like razor blades.

Can anyone please offer suggestions on how to relieve the agony I don't want to wean him because he is still soo little and he isn't ready to give it up yet, but I don't know how much more pain I can tolerate

Thanks xx