First get a sonography done to confirm whether the pregnancy is in fallopian tube or in the uterus. Colour Doppler can be useful. It is not harmful at all for the foetus or your reproductive organs. If the foetus is in the tube, it is a dangerous situation for you. For constipation, you can take Isapgol powder 2 tsp in a cup of warm water at bed time. For your fever, consult a Physician. You need not do a sonography every month - once within 3 months (at 4 1/2 months, 7 months and at 8 ½ months) should be done - more frequent sonographies should be done only if necessary. The monthly growth of the foetus can be judged clinically by the obstetrician.