Weight yes it might be one reason ,,,, what is your height and weight

You need to combine weight loss and exercise, plus try having intercourse during fertility period, i.e. 11-18 days of ur cycle. There might be a problem in conception. But give it a try for atleast one year, focussing on  fertile days.

Yes it is

• Infertility is defined as “inability to conceive after 1 year of regular, frequent unprotected intercourse”. Therefore, we advise the couples to investigate for infertility after 1 year of regular trying. • In some couples, waiting for 1 year is not advised. They are having high risk factors for infertility. In such cases, we advise to test if they fail to conceive after 4-6 months of trying. These include- women with age more than 35 years, irregular periods, painful periods, painful sex, previous operations in uterus/ tubes/ ovaries, endometriosis, PCOS and previous cancer treatment; and men with previous operations in genital area, sexual problems, diabetes, varicocele, hormonal problems and previous cancer treatment. • Therefore, we start treatment when you have been trying for 6-12 months and have done some tests. • However, if you feel you cannot wait for long time to try, before doing the tests, you can do the tests. But please remember, in that case, the chance of over-treatment is high. • It is also important to do some tests before you plan for pregnancy (Pre-conceptional care). Reduce weight as it increases the chance of pregnancy.

Maintain a healthy BMI .start losing weight by diet and exercises.consult a gynecologist please