Am I pregnant?

Deep down inside I feel like I'm pregnant but I keep convincing myself otherwise and it's kind of bothering me. In June my boyfriend and I had protected intercourse but we didn't know the condom broke. I started to spot around the 2nd or 3rd day after intercourse then I took the Plan B pill. At the end of June, July and August I received my periods but after that I haven't had it for 4 months. I haven't felt tired, nauseated and I never felt this fluttering/popping sensation in my lower abdomen before until now. I took a home pregnancy test and a pregnancy test at my doctors appointment I had and they all came out negative. I started my period 5 days ago and I still feel these symptoms. I can't even sleep anymore and I'm super tired and my stomach is hard in certain areas. Could I be pregnant or is it something else?