Is it possible my gyno is wrong?

Based on what she noted: I'm due in early March and I'm 26+4 weeks today. With that, I found out around 16 weeks at my PCP but didn't feel anything. No kicks, moodiness, morning sickness, lactation, nothing. I started to feel kicks around 20 weeks, and everything else later on.

Based on what I noted (which is about a 3-4 week difference from my gyno's estimate): I'm due in early April and I'm 30+3 weeks today. With that, I found out around 13 weeks. around then I didn't feel any kicks either, UNTIL a few weeks later around 16-17 weeks, and also had cravings for meat (I'm vegetarian so it was weird) around that same time frame. Around 10-11 weeks I started to feel very intense hip and joint pain. Around 19 weeks I started to feel constipation and got a lot more facial hair growth. Around 22 weeks I started to get weird voice changes (it was softer but hoarse-sounding).

For what my gyno noted as 30 weeks, I have a pretty small bump considering I can still hide it a bit.

I also didn't feel much until I was around my estimate of 6-7 weeks, but felt nausea around 1-2 weeks. To add, I never implanted until June, around a week after I had sex. I tested in late May (which is what she says is when I got pregnant) and it was negative, and didn't test again until September which was positive.

I probably sounds like a clueless idiot but I'm honestly just curious if she could be off.

Edit: I never got my period in April but it was because I was under a lot of stress. I didn't get it in May either but I tested multiple times that month, more toward the end, and they all came back negative. The doctor couldn't tell when my LMP was that way, and based on the date she gave me, the calculations for conception and my LMP are very wrong.