Missing....one period!

[Ineedtosleep79]

So one present was absent Christmas day, my period! That would have been day 29. It's now day 33 and it's still not here... Usually I start between days 28-31.

I dtd on day 15 and (I think) I ovulated day 17/18.
I took a negative test at midday today.
2 days ago I had a pink smear/extremely light spotting (which could be implantation bleeding).
I've since read that the Hcg levels start 3-4 days after implantation so do you think I'm testing too early?
If that was implantation bleeding it would be around 13dpo but it could be 12dpo at a push which seems to be the limit for implantation or so I've read.
I'm really at a loss 🤦‍♀️

I also dtd on day 28..which almost seems silly to mention, but I've read that some women can ovulate twice.
Thoughts?

If you're two days late a test would be 99% positive now, at least the Clearblue and First Response ones, is that what you were using?
So I'd imagine your period is just running late but obviously can't say for sure - you can only wait and test again in another couple of days..