I'm sorry you guys are having a rough time with solids. I don't have much advice because Brina has taken very well to solids so far. You may just want to take a break for a week or two and then try again. Maybe having a break from it will give her a chance for a fresh start.
I hope everything gets better for you. We need to see some pictures of Tessa!

It seems like you are doing everything right....you don't want to try to feed her when she is hungry because that will only frustrate her.

Did you try pumping some milk with cereal on a spoon? At least the taste will be somewhat the same. Or you could try pumping a bit and putting some cereal in a bottle with a larger nipple with your milk.

My baby is nearly 6 months and she hasn't seemed too interested either. She loves breastfeeding, but will take a bottle too. I did have one child who did not want anything but breastfeeding and I had to wean her to bottles because I was pregnant with my next. Perseverance is all it comes down to really. It usually takes a few weeks before they will actually eat a decent sized portion of cereal.

Have you tried her on bottles at all yet? Maybe if you tried a few bottle feedings first she would realize that there are other ways of receiving food other than your breasts. You can use you milk or formula. IT will take a little longer to get to the solid foods, but it might help.

Waiting a few days between attempts to start solids is all you need to give her time. She will get to it eventually. Best of luck to you and your little darling.

She does take a bottle of pumped breastmilk, usually (lately not so well because she is highly distractable). I tried making up rice cereal with breastmilk, and she's not having that either. I also tried oatmeal, and no luck. I'm going to give it a rest for a week and then try again.