Insulin infusion site issues with the pump.

Hello, I am hoping someone could give me some advice or any info with some issues I am having with the pump. BACKGROUND I am on the Medtronic 630g as of 4/18/17 (my first pump). I am a type 1 diabetic 30 YO that was diagnosed at age 20 from a autoimmune disease (stomach infection) that killed off the beta cells. I am 5'11" weighing in at 152 lbs. I just quit drinking two weeks ago. ISSUES The insulin isn't being full delivered to me I believe. I have been running very high the last week and a half, but not consistently. I found when I change the infusion set the cannula is bent slightly or there is blood inside the cannula like I hit a capillary. I have taken my time now changing the unit out. I move around for my job a ton but I don't think that's the culprit. Is it possible quitting alcohol that thinned my blood could affect the blood in the cannula? I also got a tattoo on my stomach and chest (just the outline) but I have had issues on the lower back and I go in spots on my stomach that aren't tattooed. I see my educator on Wednesday to ask her some questions. I have actually ran out of sensor units due to them ripping out or sweating off but Medtronic is on back order. If anyone has general advice too I would love to hear it. I apologize if this is isn't formatted the best. Thank you for all the info.