I just expressed every time he was having a bottle, so my boobs knew he was wanting to feed. I know that worry, and I hope you do manage to get yourselves sorted.
The TT symptoms for me were flat, blanched nipples after every feed, which progressed to black nipples (the whole nipple was blood blistered by two weeks), there was always pain when he latched on, but again this progressed to the pain for the full feed after about a week. The milk I was expressing had blood in it, it was a nightmare!
DS was fussy and frustrated on the boob from his first feed just after he was born. He'd be trying to feed, then come off, shake his head, then try to re-latch, and he'd do that for hours at a time, swapping from side to side to try and get him to latch. He'd fall asleep during a feed, but be really unsettled, and wake soon after, wanting to feed again. He was honestly on the boob more than he was off, but he never seemed satisfied, he never got that milk drunk face you see in little babies until he was a few months old. He would have a white coating on his tongue that was repeatedly misdiagnsed as thrush, even though it would go away between feeds. He had terrible wind, and would dribble most of his milk back out down the sides of his mouth when he was having a bottle. He would scream for hours and hours in the night, I don't know if it was hunger, or pain from the wind.
He also turned out to have a cows milk protein intolerance which won't have helped anything either.
If you suspect a TT see a lactation consultant, not just a midwife/HV, as they're commonly missed and misdiagnosed.