possibly pregnant??

So the past 2 weeks I've had trouble keeping food down, been extremely nauseas and sick but only after I eat or immediately when I wake up. My nipples have been more sensitive, my back has been getting knots more easily, and I've had a lot of headaches. Today I woke up and felt the nausea, but I also have been pooping a lot (tmi sorry)?? Like I mean I've pooped 4 times since I woke up an hour ago. I am on birth control (Evra patch), but sometimes I put it on an hour late or it gets bunched up through the week and isn't enirely secured so I don't have perfect use and that's the only protection my bf and I use and he always finishes inside me. And last week I had some weird spotting that I've never experienced before? I had 2-3 drops of red blood in my underwear and a drop or two when I wiped and that was it, I never saw any more blood.

Am I right to think I might be pregnant? Do I have a chance at it? Like I said, I'm going to test next week if my period doesn't come but I wanted to see if anyone can calm my mind a bit, thanks!