I'm too new at quilting to say anything except I'm so sorry this happened to you. As the old saying goes better luck next time and with the advice from all these good quiltrs on the QB am sure you'll do great next time.
Welcome to the Quilting Board!

I'm too new at quilting to say anything except I'm so sorry this happened to you. As the old saying goes better luck next time and with the advice from all these good quiltrs on the QB am sure you'll do great next time.
Congratulations on your first quilt. Remember it doesn't have to be perfect. If it were me, I'd just try to slip stitch the seams together and applique something over them. Good luck. Let us know what you do.
It looks like there isn't any quilting in the area where the fabric frayed. It allows the fabric to move and pull during washing. I would tuck under the places that have frayed and do some topstitching to secure it. Then I would do more quilting all over....maybe using a deco stitch along the seams, they certainly won't pull loose then! I use a deco stitch along the seams all the time, gives it a crazy quilt look.
I would hand stitch those oopsies closed again. Just tighten the seam up a bit, make sure you are sewing through intact material. In that a big a project it won't be very noticeable. The idea is to basically applique the top strip to the bottom strip. Then if you want to go crazy with fancy stitches on top - go for it! And remember - we all make mistakes, that's how we learn what NOT to do. Keep checking to make sure the strip on the bottom hasn't shifted while you are sewing.
Thank you all for the feedback!! I think I have a pretty good idea of what to do now and I defnitely feel better about my oopsie! Do you guys think I should add some more quilting so they are closer together or if I just do some sort of stitch over all seams that would be enough?
Contgrats on your first quilt!!
You can also get some light weight knit fusible interfacing. Tuck it into the quilt, with the fusible side up, then pin the fabric in place, as the other posts directed. USE A PIECE OF COOKING PARCHMENT< OR A NON STICK PRESSING SHEET on top of your quilt, then press according to the instructions for that interfacing. This will stablize the fabric. I would then stitch over it. Be sure to put something between the iron and the quilt or you might get stuff on your iron.
I would do sort of a wiggle stitch over the seams if you think that there may be additional areas that had a slightly too small seam. Just a wave that crossed back and forth over the seams.
"I do not understand how anyone can live without one small place of enchantment to turn to."
Marjorie Kinnan Rawlings
I agree with Buckeye Rose, you really need to quilt more. If you read the quilt batting package, it will tell you the maximum distance apart that your quilting can be. Most of the 70\30 and 80\20 cotton blends need to be quilted 4-6 inches apart. Some brands will let you quilt farther apart than that. I really like the colors of your quilt and it should last you a good long time with a little more quilting.
The fabric is not flannel.
The quilting is only 4 or 5 inches apart at the very widest parts too...
Hi Samantha, - it looked like flannel to me too so I was going to say that flannel naturally frays more, but the fix would be the same. Follow the advice of PaperPrincess with the fusible tucked under the fabric, and then if you have a decorative stitch on your machine, topstitch along the seams. I think it will add a nice decorative element and look like you planned it. Congratulations on your first quilt - I love the pink fabric with reindeer.
A fabric stash is always missing that one fabric needed to finish the quilt on which you're working.