Should I get a blood test or keep waiting?

TTC with irregular periods 🤦

So my periods are not always at the same time of the month, they usually vary about 2-3 days but have gone 14 days late before. It's been over a year since that last happened. I track ovulation with tests, got a peak on the 8th, bd'd every day for three days leading up to that. However I can almost always tell when it's about to start due to symptoms. This month none

of my normal period signs are cropping up yet.

I thought this month was going to be a good month for it, but now I'm 5 days late- all pregnancy tests are negative. (Used first response, Walmart cheapie, and pregmate). I had 3 days of odd spotting for me, I don't typically spot, but for 3 days before my period should have been due I had one wipe a day that had faint pink on it. Then it stopped and I haven't had anything in a week now.

I'm just wondering at what point should I go in for a blood test at my doctor's?