I don't know if I can be pregnant. Should i test?

Okay so my period is 1 to 2 days late. Beside the fact that is 15 days more late than my first cycle (my last cycle was 15 days late I think it changed). I have a few symptoms but I am not sure to consider them symptoms. Since I don't have experience on it So I need someone that knows a lot about it and please tell me if there is a chance I could be preggy. The symptoms are: pain in the breast (like if I poke them a little). I have mood swings. I have nausea that feels like I want to burp but I can't. A uncomfortable pain in the lower abdomen. Constipation. Tired been sleeping a lot recently and been waking up during the night a lot of times and go back to sleep. Sometimes I can't sleep at all. Cm:wattery and translucent.

Please serious answers.

Sorry for writing a lot I just don't want to test in vain.