Late by a week, HELP!

Around Jan 4th I had protected sex with my boyfriend while knowing my period would start in a few days if not the next day as I had all of the intense symptoms per usual. After sex, those symptoms died down and crept back up a few days later. I had protected sex again on the 9th and the same thing happened, the symptoms almost vanished and slowly crept back. Now I'm about 5-9 days late and concerned WHEN and if I should get tested. I still have all of my symptoms, yet my period is always irregular (33-48 day cycle) and heavy. I'm so confused, please help!