I gotta agree. If they're enough to make you stop talking and breathe, then they're too strong, regardless of how many there are. And with discharge, and cramping, I think would be very concerned.
I think the usual recommendation is more than four an hour, for more than an hour.
The real issue with contractions of course is whether they're leading to cervical change. I would be asking for a transvaginal ultrasound, to measure cervical length. Or a My first DS was born at about this time. I never even realized I was laboring until it was way too late to intervene. I don't know for sure that we wouldn't have been able to stop it, and buy DS a little more time so that he might have survived. But I don't know that we couldn't have, either.
I contracted a LOT during my twin pregnancy-- I had a period of time every evening when I contracted, sometimes as much as six or seven times an hour. But they were weak, disorganized contractions that I only noticed if I paid attention. And they never became "labor," and were always gone by the morning. Even so, I went three times in the late evening to see my HCP, because there's no sense taking chances.
A fetal fibronectin test is expensive, and a positive result doesn't mean too much, but a negative result can be extremely reassuring.