Hi
Welcome to the MedHelp forum!
Some cramps are expected in pregnancy due to hormonal changes, gas, constipation etc. If you have a tipped or retroverted uterus then this can also cause pain. It can also be due to infection. Any sharp pain in the abdomen can be due to gas, threatened abortion, infection or due to unrelated causes such as kidney or gall bladder stones.
In your case since it has been happening for last so many weeks, it must be gas. Watch what you eat and keep a log and see if what you eat is related to the appearance of pain. Some food items cause more gas formation than others. Take care!
Baby's head pressing down on the cervix can cause intense pain. Does changing your position help the pain at all? When I had this type of cervical pain, resting with my legs and hips elevated helped because I think it shifted baby's position.
I'm not sure about the other pains that you're having, but some of your abdominal pain and feeling sick could be from the amount of paracetamol (acetaminophen) that you're taking. 500mg x 10 tablets a day equals 5,000 mg of acetaminophen, which is 1,000mg OVER the maximum daily dose.
You also need to double check and make sure that your codeine phosphate does not have added acetaminophen in it - it sometimes does (or can). The codeine itself can also cause stomach pains and an ill feeling.
I wish you the best of luck and a happy, healthy baby!