confused and anxious

today I am on cycle day 33 of 29. hubby and I bd a few days before fertile window and a few days after supposed fertile window ended. I have taken a few hpt and they are all bfn. do you think I ovulated late if so when we bd after what I thought was fertile window was it actually in fertile window? how long should I wait for period or positive hpt before I call doc? I had a 23 week miscarriage a year ago next month. hoping to have a rainbow baby.

could I be pregnant or am I getting excited for nothing?