Not sure if pregnant or not

Greetings,

First of all, my periods are very irregular so I never know what month I’ll be coming on my period. The last time my period was here was in the month of March. My boyfriend and I had sex the weekend of May 5-6 about 9 x without any protection or withdrawal method. Then the next weekend May 12 & 13 we had sex about 4 x without protection or withdrawal method. Lately, I have been really tired, little nausea and dizzy, breast feeling sore, a little bloated and just been feeling real odd. If my period comes, it’s suppose to be here on next week. I don’t know if I should wait to see if it will come or should I go ahead and take a test. What should I do or what is going on?