I used to have that problem, so my doctor prescribed some eye drops for me. The drops worked like magic! It was a very small bottle ($40), but it lasted a good while. I haven't had any major issues since then, but I do get the occasional irritation from my contacts. I'm sorry I do not remember the name of the medicine, as it was several years ago. Ask your doctor to prescribe some eye drops for you.
I've also recently switched to Acuvue Advanced and they seem to be a lot better than my B&L ones. Supposedly they allow more oxegyn to your eyes, which allow you to wear the contacts for longer periods each day. I've been very pleased with them so far.
I know what you are going through and it is very frustrating
Good luck!