No symptoms of my period yet? Am I pregnant?

So i usually start my period the beginning of the month, this month I had mine on the 5th and it lasted 3-4 days. It’s the 28th today and usually I feel symptoms like 9 days before my period, sore breasts and cramps. I have been getting cramps, ranging from mild to pretty bad. My boyfriend and I do have sex but we’ve used a condom every single time, and he finishes in me but with the condom on. 2 days ago he didn’t use one, but pulled out and didn’t *** in me. I took a Plan B just to be safe and the cramps have gotten a bit worse since then. But still no period symptoms and I’m really worried, my lower abdomen hurts a lot but I haven’t had any other pregnancy symptoms. Is this normal? Am I pregnant?