Hi On The 17th November I Took Levonelle And Began

Hi on the 17th November I took levonelle and began my period on the 22nd (my usual period starts on the 1st). And then on the 5th December I began spotting brown blood for 3-4 days. I also have been feeling quite bloated and my stomach feels really hard, especially behind my belly button. However I haven't had a period since and since then I have had protected sex (condom). Was wondering if it is normal for your second period to be late after taking levonelle or if I could be pregnant?