No, probably no problems, just the fact that you were along with the first returns being filed and in the beginning it can take a little longer.
You could check "where's my refund" on irs.gov to see if additional information is available.
Please refer to the following link for "where's my refund" return filing information:
Where's my refund
Unfortunately, I have to remind you that your return was filed during the time period when the IRS was first accepting e-filed returns, testing their systems out and receiving large quantities of returns to be processed. That initial time period when IRS first opens e-file for the filing season, the processing of some returns take a little longer with so much being tested.
Please refer to the following link for additional information:
How long will it take to process my return
