Hi Tommy, and welcome!
Well now, first of all your plant (Phalaenopsis) looks pretty good and not in any trouble... it is good to hear you are not overwatering it (or underwatering, but that is less of a problem). OK, so there is a scorch mark on one of the leaves- no big deal.
I hope I am not being insulting if I say that all blooms naturally will turn yellow and fall off. I have loads of Phalaenopses, and after a couple of months the blooms do just that, one by one.
So the question is: how long have the blooms been open before they go off? A Phal bloom should be bright and open for at least six weeks... and as they open in sequence, so they should be falling off in sequence too. Is that the case? Or is there a wholesale morbidity of flowers (I doubt this is the case, but let us know!)
In Phals you do get BUD-DROP if the plant gets a physical or thermal shock... where a lovely fat bud goes yellow and falls off without developing further and opening. Several may do it at the same time. (This can happen in transit from shop to home.) But an open flower will stay the course come what may.
Also, I see that this plant has been flowering its guts out: I see multiple branched bare spikes... I am guessing you had a fabulous show. There are some amazingly productive hybrids out there which can exhaust themselves if allowed to go on flowering. (I let one of mine flower non-stop for four years, just to see what would happen; this happened: I had to cut the spike off recently, as the plant was down to only two stunted and shriveled leaves... it is still in intensive care. These are very tough plants, but it is now touch and go with this poor guy!)
SO at first sight, I reckon your Phal needs to have its flower spikes cut RIGHT off. pronto; then you just give it normal care (with a bit of weak feed) and it will soon start shooting again when it is ready- maybe in as little as a month. (I always cut my spikes right off, even though the old ones will reflower if cut down to one or two joints. Believe me: you don't want doddery second-hand spikes when you can have brand new fat ones bearing big bold blooms. Don't listen to anyone who tells you different!)
Get another Phal to take your mind of this one while it takes it easy for a bit. No worries. Happy days!