While shedding can often be a sign of hair loss, it isn't always a good indication. E.g. you can not shed any hair and still be losing ground with the hair miniaturizing, while you can also shed a ton of hair and not be losing ground (like a lot of women). There's a very good chance that minoxidil would help thicken everything up, but it depends on if you're willing to commit to it or not. Personally I don't use minoxidil because even though it would most definitely help out, I'm not willing to spend 10-15 minutes twice a day putting it on for the rest of my life. Where as I don't mind "popping the pill" once a day with finasteride.