PCOS, Late...Again...

Hey everyone! So I have PCOS and my cycles have been irregular lately again. However there has been a trend in my periods. Some months they are late by a couple of days, others by a whole week and then come the following week. This month is one of those months. I'm currently a week late and I'm trying to wait until next week, but my mind is racing. I've taken two pregnancy tests already and they are both negative. Before - and leading up until - I found out I was pregnant with my daughter I chucked my missed period up to my irregular cycle as I had been used to it only to find my breasts were so sore and painful and that is when I found out through a pregnancy test I was in fact, pregnant BUT at the time didn't even notice I missed my period because I gave up tracking them because I was so used to it at the time. Now, I'm tracking it EVERY month and I'm not sure what to do this time. I freak out and take a pregnany test every month I'm late as a general fear of not wanting to accidentally get pregnant and not necessarily know. Me and my husband are trying to have one more baby, but it seems as if my body keeps playing tricks on my brain.

What do you all suggest?