pain level and side effect from taking epidural

I took epidural during my 2nd labour but not the first. To administer the epidural was hell for me because I hate, hate, hate needles. You'll be told to sit really still and there will be a slight electricute-like pain down your back. For me the pain was too unbearing so the nurse had to readminister it. Once it's administered, your pain magically disappears. I'll list difference I felt afterwards, whether or not epidural was the culprit. 1) In my 1st labour, I could walk about 4-5 hours right after birth without support. In my 2nd, I felt pain whenever I got up, walked, bend to pick baby up, lie down, etc for about 2 weeks. 2) I love aircon, the colder the better. After my 1st, I still love it. After my 2nd, I switch off the aircon if it rains and wear pants to sleep PLUS covered in my comforter because it's too cold for me. 3) My backaches are much more frequent after my 2nd delivery & I realized I can't sit on a solid surface for too long.