Did this happen to you? Explain if you have experience this

Yes i have been having sex with no pull out , my next AF is due in 3 days. My boyfriend notice my stomach is hard where I cramp from the right side like in the middle of my lower stomach like by the bikini line , my left side is normal the right is stiff kinda hard to push on. For the past 2 days I have been cramping when I wake up in the morning with cramps that can last for hours on the right side with pressure in abdomen area. Should I take a test? I haven't been stress I've been happy.