First time TTC- fruitful?

Hi all, I'm 30 years old, just started TTC. We never really wanted children but in the last year something has twigged inside my husband and well, here we are. :)

So I've been on the pill for a solid 10 years. I had my last period 24-28 July and stopped taking the pill end of July (I took like two active pills before we firmly decided to have kids).

We have started trying immediately, even though we understand there is a 3 month "window" (but the chance of pregnancy is always still there).

The past week or so I've felt very "off". But I don't know if they are actual pregnancy symptoms or just my head or what, because they aren't CONSISTENT (other than the cramps I have been experiencing).

My symptoms include cramps (as mentioned), nausea on and off, sore lower back and hips, dizziness and light headedness (I actually felt like I was drunk this evening), bloating on and off and fatigue (but I do also have low iron so this is a tricky one).

I am also currently late for my August period, I was always very regular even before I started taking the pill.

I have just taken two HPTs, both on Sunday (two different brands, because I don't particularly trust one brand).

Am I being too over excited/ eager and misconstruing what I'm feeling? Is it just my body trying to adjust to being off the pill?

Thanks all!