Is it possible to miss a period without being pregnant?

[MyCatStares]

My periods have been quite early since I took the MAP in October last year, anywhere between 2-5 days early each month. However this month I haven't got one at all. I expected to probably come on last weekend as its usually early, but my cycle is now on day 29 and still nothing. I used to get my period every 28 days like clockwork until the MAP.

I've taken about 10 pregnancy tests since last weekend, including first thing in the morning. One of the tests was a clear blue that said it can pick up 25ml HCG from 4 days before your period is due. The other ones pick up 10ml HCG, so all quite sensitive. Every single one has been negative, not even a small faint line on one.

Is it likely I could still be pregnant? I'm hoping I'm not but I just don't know why I'm still not getting my period.

Very stressed about the whole thing.

You're stressing yourself over it which is probably making it later. I'm sure that's what it is.

Thought I'd update you all... so I stopped stressing about my period being late and it arrived.Slightly embarrassed about the hysteria with the pregnancy tests.

I think I was sub consciously very stressed about a different issue without realising it, once I fixed that problem I felt much calmer.

Thank you all again, you all really helped.