Due date question

Ma

Hey everyone! So I’m a ftm and had a question about something I recently figured out over the weekend.

We found out I was pregnant in March after thinking we couldn’t have kids. I had an iud placed when I was already pregnant and the clinic failed to check so I didn’t find out until I was pretty far along.

We were in so much shock and so worried about the outcome that when they were asking about my last known period I just guessed.

Well after having deleted the glow fertility app before this all happened out of frustration I finally logged back in this weekend to see if my data was still there because this whole time I’ve been feeling like my baby is going to come early.

My clinic has me due at October 21st from what I told them but the app still has all of my data and my last known period plus ovulation cycle and when we had sex. Baby is also measuring one week and a few days ahead of my due date.

According to it I’m more like 29+5 and would be due October 10th.

My next appointment because of how far along they think I am (28 weeks today) isn’t until three weeks from now.

Is it worth calling my OB office to mention I figured out this new information? Would it matter? Should I just wait until my next appointment? I really want to know for sure but I don’t want to bother them. What would you do?

*The iud is still in there, but out of the way, making me slightly more high risk. I’m going to a new OB that specializes in cases like this, not the one that placed the iud without checking*