nauseas when i eat a couple of bites, and ready to snap?

Hi,
Welcome to ehealthforum,
If your fertility/ovulation has returned after your IUD removal, and if you have been sexually active without protection during your fertile days/ovulation time, chances of pregnancy are possible as suggested by the symptoms that you describe (shorter periods, headaches, low backaches, achy & tender breasts, dull breast pain, abdominal cramps, nausea, increased sensitivity to smell, increased tiredness, increased sleep). Few women can experience the symptoms as early as 24-48 hours after fruitful intercourse. Wait and watch for your next periods. Look out for development of any other new symptoms if pregnancy is suspected. It is difficult to comment of the pregnancy status without examining you. If you develop any new symptoms suggestive of pregnancy, or if periods do not start within 10 days of expected period dates, or if you get abnormal periods, or if you suspect chances of pregnancy, consider visiting your doctor/gynecologist at the earliest for thorough examination (to confirm pregnancy related changes/signs in body) and blood/serum HCG level test (to confirm/rule out pregnancy accurately). Be in regular monitoring and follow-up with your treating doctor/gynecologist and report any new/abnormal symptoms immediately. Drink plenty of water. Take adequate rest. Maintain healthy diet.
Take care.