A.V.
My son also cryed like this his Dr said it was colic. He finally out grew it at 7months, so there is hope in site. The best things that worked for me were drinking fennel tea, it is a natral anti bloating/ anti gas. I also gave him over the counter simethicone target brand drops, it really helped. Warm baths with lavender baby wash. Singing row row row the boat while bending his leggs to his chest (often this made him expell HUGE amounts of gas more than you would think could fit in a baby) I tryed not having any lactose and it didn't seem to have any effect, I also avoided a long list of gas causing foods but they didn't seem to be the problem. I hope this helps, some times knowing that other people have had the same difficulties also helps.