Help me!! *Warning it’s a little long

So, I just turned 26, and my fiancé and I have been trying since December. Here’s a brief over view of my birth control history...at age 17 I went on the pill for about a year until I switched to the depo shot. The shot was great, never got a period, didn’t gain weight, and I stayed on it for 7 years. Then I met my fiancé and we got engaged after four months of dating; we’re now together 3 1/2 years. So when marriage started to make its way into the picture I decided to get off of the shot in preparation to have children within the next few years. So I switched to Skyla and absolutely hated it!!! I had it in for about 3-4 months before going back to my obgyn to have it removed and I started back on the pill. I got my first period within a month (Last December), and continued to remain regular for the year. Now this past December 2017 was when I stopped taking my pill one day in the middle of the month because we both decided we just didn’t want to wait anymore! Stopping the pill made my period come two days later, and then I got it again in January. Here’s the confusing part...I was 11 days late in February, got my period in March, skipped the month of April and got my period Memorial Day weekend and then again the end of June for 9 long days! So, if you’re still following me...I didn’t get a period in July, and per my calendar I should’ve ovulated on the 9th or 10th, but felt a strange pain on the lower left side of my abdomen on July 25th which made me dust off those ovulation strips I had bought months ago. The test was a big positive for LH so we did the BD that night and the next day. So it’s now August 14th, I took a pregnancy test today, and it was negative. I also have an appointment with my obgyn on Thursday 8/16. So I guess I have a few questions for you all...

1) Could I be pregnant but it’s still too early to tell?

2) Did anyone have similar issues with these forms of birth control and TTC?

3) If so, what were some things you tried to regulate your cycle and help you get pregnant?