Chance I am pregnant?

So I am very sexually active with my husband, and I am on the pill. However during this months pack, because of some unforeseen circumstances I had missed a few pills and had taken some late. I just continued on as normal. I started to feel kinda strange closer to the day my period was supposed to start. Your average PMS symptoms. Sore breast, moody, bloated, etc. except some things have never happened to me before. My back was killing me, and I had a very large amount of white discharge the day before my period started, these things never happen to me. I thought “could I be pregnant?!” But the next day, Aunt flow showed up right on time. However even it was different. I am usually very heavy right from the first day, and slowly get lighter towards the end. And it always lasts the whole 7 days, or at least 6 days. However my periods started off very light and pink. I didn’t even bother with a tampon at first because it was practically not even there. Then it got heavier to the point I needed one and seemed to be more like my regular period. Then it lightened up again and went brown in color. The brown in color is not new to me this usually happens before the end of my period. Now the weird thing to me is, it only lasted 4 days. If that because the beginning it was so light. This is very strange for me. But I didn’t think anything of it until today. I had a great nights sleep for a full 8 hours. However I was extremely exhausted today. I woke up feeling sick so I took a gravel to get myself through the day. But I could barely keep my eyes open at work. And I was doing stupid things like looking for my phone while holding it. And emotional! I wanted to cry because the filing cabinet was a mess and then I wanted to punch the person in the face I was so angry. and I had a clear discharge that was sticky in texture which had never happened to me before ever so I googled that, and now I am wondering? Could I be pregnant. Thoughts? Stories? Experiences? I bought a test and counting down the minutes till morning when I can take it. It feels like I’m waiting for Christmas morning I’m so impatient.