3 positives and 5 negatives??

Hi guys! I currently have a 15-month-old little boy. After I had him, I got put on the nexplanon birth control as it was the best option for me. Fast forward to about a week ago, I started having pregnancy symptoms. It started out with dreams that I was pregnant, which was my number one clue with my son and the reason I took a test (besides AF being over a week late). When I found out about my son, I was exactly 5 weeks. Keep in mind, my doctor tested me a couple weeks prior to finding out I was pregnant, when I went in to order my birth control. I tested negative, but I was actually 3 weeks pregnant. So about a week ago, I started having the dreams and some symptoms like my face breaking out. I took a test in the evening time on the 12th and got a faint positive. Took one that next morning with FMU, and got another faint positive. Went to a clinic that does free tests, negative. Went to a pathology lab and got blood work done and waited 2 hours for results, negative. Took a few more tests, negative. But then I realized that the tests I got positives with were early detection tests. The ones I tested negative with, were not. So today I went and got a box of FRER and a box of Equate early detection tests. The equate came out faint positive, and the FRER came out negative; but I did test in the middle of the afternoon. Throughout the 4 days it’s been since I first got my faint positive, my symptoms have intensified. Headache for the past 3 days, mood swings, swollen breasts (not tender), stomach cramps, back cramps, and today I had to leave work early because of all of those symptoms, plus I was sooo nauseated. And I have been ridiculously tired these past 4 days. I came home and took a 3 hour nap. Every day for the past week, I’ve had a dream about testing positive; which again, was my number 1 sign with my son. Not to mention AF has been all over the place since I’ve been on my birth control, but the heaviness of it has stayed the same. I skipped last month’s cycle and started this month on the 10th, but it’s sooo light! Heavier than spotting, but not enough to even fill a tampon throughout the whole day. I felt my implant yesterday and it feels like it might be broken, so I guess that would explain how I got pregnant on the most effective birth control there is. Then again, my son was a plan B baby. It’s like the universe just wants me to have babies when I’m trying to prevent them! So anyway, what do you think? It is possible that I could be pregnant but just very early, and that’s why the other tests have been negative? Surely I couldn’t of falsely tested positive on 3 different tests? Help please! This is driving me insane not knowing.