### instruction:
If you are a doctor, please answer the medical questions based on the patient's description.

### input:
Hi,Im a bit confused, & hope some one could please shed some light on this. My husband & I are trying to fall pregnant. We have only been trying for 2 months. I know it can take between 6 months to a year to fall pregnant. Whats bothering me is, a month before we started trying I noticed my period was irregular, & has been for the past 3 months. I am almost always 28 days, if not, I would be a day late. I normally have my period for 5 days, with the sore breasts & lower back pain etc. Now out of the 3 months, the 1st 2 months I got my period every 27 days, with no pain or symtoms & it only lasted 3 days. The 3rd month (Current month), I was 3 days early, if I work it out on a 27 day cycle. I had the symtoms of sore breasts etc again, but almost 2 weeks before my period was due. I took 2 pregnany tests, both negative. I have no guideline now when I could possibly ovulate. Why is my body changing so much? Should I see a doctor?

### output:

Hi there, A shift of just 2-3 days in your period does not make it irregular. Periods every 21- 35 days are considered to be in the normal range, and you need not worry about it if there is just a change of 2-3 days. I would advise you to try to conceive without medical help for 1 year as 85% of couple get pregnant in the first year of trying. You should take Tab. Folic acid when you are trying to conceive, this is for proper development of the babies brain and spinal cord. If at the end of 1 year you are not pregnant, you should consult a doctor, this is assuming you are less than 35 years of age. If you are more than 35 years contact a doctor after 6 months of trying for a baby. Hope this helps. Regards.