Sodium is no longer believed to have the terrible effect on blood pressure that is once was thought to have. If you like salt, eat it - just don't go to excess. If your blood pressure is low, it is probably because you exercise. Don't worry about the blood pressure so much if you aren't having problems from it. All of our bodies are different and a blood pressure that is dangerously low for one person is just fine for another. Same with the upper end of the scale. Some people who have 180/80 are just fine - others are at higher risk for
cardiovascular disease from it.
2 years ago, mine stayed about 200/100. Now it stays around 110/50 - as low as 90/60 if I'm completely relaxed and just finished sleeping. Must have something to do with not being a lard a$$ anymore.
As far as not gaining weight - I can understand that. I'm sure you get sick of hearing the, "eat more" comments. I know when I was bulking that's what everyone kept telling me, it was a real struggle to get over 2000 cal a day. Finally I got where I could eat 3500 without feeling like I was overeating. I just chose to add some fat to my diet, and made the highest protein choices I could find - mostly steak and tuna. Plenty of
chicken breasts too. The whey powders can also help a good bit here. My plan is to mix them with milk while bulking, water while cutting. Plus I use 2 scoops three times a day, instead of 1 scoop a day. That helps get those calories up without feeling like puking too.
Puking should come from your workouts - not from your food.