I have irregular period.

I had my period :

23/12/2016

24/1/2017

No period on february

3/3/2017

Had unprotected sex  12/3/2017  and i'm pretty sure i was ovulating  i took "morning after pill" ellaona on 14/3/2017 which i've been told that it has effect up to 5days, it delays ovulation but it doesn't make it's effect if you're already ovulating. 

Now i've been having painful breast since 23/03/2017, sweating, skin rash, constipation, milky white vaginal dis charge and some days watery dis charge, back pain and some very mild  cramps, not even painful.

I'm really afraid I might  be pregnant, i'm single with no assurance. I know i had to think it through  before but it happened.