Okay like 6 months ago my husband and I turned our water off, and left it off till like a week ago. Our main water line had rusted so badly that it was water was coming out of the seems, so we had to replaced that and a "T-Line" in the process we had to fix our bathroom and kitchen sink. The Bathroom works fine, how ever the water pressure to the kitchen sink, any one have an idea other then maybe mud in the line some where, and have a plumber come with an air gun and blow it out. I really don't want to put any more into this, I've already put nearly 400.00 into it.

Shutting off the main and the other work you did probably disturbed a lot of debris in the lines. First remove the aerator and make sure it isn't blocked. You should then shut off the main and remove the valve stems from the sink. Inspect and clean out any specks, usually white or red. Place a towel over the stem opening and hold pretty tight while someone else opens and quickly closes the main. This will help flush out more jump from the lines. Since someone worked on your kitchen sink check to make sure both stops are fully open on both lines. These are the two valve things under the sink on the supply lines. If this doesn't help please come back.