Give it time. I have been on it over ten years and have no problems crohns wise. I have had several blockages but I attribute those to scar tissue from surgery.
The remicade did take a little while to take effect so do not lose hope. Though I see many people saying they feel different (sleepy, woozy, sick, etc...) after their infusion I feel NO difference at all. I actually make sure I stay up all night the day before the infusion so I can catch some zzzzzz's in the hospital while getting my infusion.