I had invitro done in March, then my period came three days early but for a short period of time. I am usually on my period for 7 days. We assumed invitro had not worked, were very disapointed. then this month I got my period on cycle day 21, (this has never happened to me I am very regular on day 28) only for two days then stopped. Then I spotted again a couple days later. I am worried invitro messed up my cycles. Of course I am wondering can I be pregnant?