Welcome to the Board! I find that everyone here is friendly and helpful.
I do want to add that when you are figuring out if you have enough yardage, you need to think about the straight of grain. If your fabric needs straightening and you are making your patches on the straight of grain, the fabric might be off grain and you'd require more fabric to make them fit.
However, since you don't have more fabric, if the fabric is off grain, starch it well before cutting the patches. The starch will hold the fabric in place until you get it sewn into a block. Once sewn in blocks, being off grain won't matter unless you are planning to enter it into a quilt show.
I've had this happen to me. I bought twice as much fabric as I needed and still the fabric was so off grain I could not cut a single patch on the straight of grain. I think most fabric nowadays is a little off grain because of the way they pull the fabric during processing.