Is It Normal To Have Change In Menstrual Cycle After A Travel?

Hi,, I'm Am,m.la, 25 yrs old and married for 14 months.. My usual period cycle was 28 days when i was in India. I came to USA last month and since then my cycle are stretched to 35/37 days. Is this normal? Also i've PCOS and taking medicine for the same. However this month, i had lots of pregnancy symptoms like tiredness, gas, vercose veins like, bloating, loss of appetite, funny sounds from stomach, etc.. but i got my periods today(35th day of previous cycle). Is it normal or am i experiencing irregular periods all of a sudden..
P.S: I take "metformin" after bfast, "fertomid" from 5th to 9th day and "deviry" from 16th to 25th day..