Six days late 😩😩😩😩😩😩

It’s got to the point I’d be happy to see my period as I don’t know what’s going on. When I say I have regular cycles they are like clock work and have been since a teenager. Negative blood test two days ago but was told if I ovulated late then there might not be enough hcg in my blood. Longest cycle ever 29 days I’m now on day 34 which I’ve never ever had before. I had period cramps when I was meant to get my period and as of now I have uncomfortable feeling in stomach and uterus heavy feeling.