<human>: Can you give me a shortened version of the text?

So I've already lost around 40 kg (88pounds), so you could say I'm not new to losing weight, but lately I've been experiencing a few things that made me feel concerned:  
- I've been increasing my cardio work and now I sometimes feel a kind of stomach ache, the kind that you feel when you eat too much and then exercise right after, but it's been over 4 hours, and my meals are actually regular-small size, like anyone trying to lose weight I am now used to keeping a big calorie deficit.  
- I don't know how to express this in English so I'll try my best: When running or doing other exercises my hands go numb, I get that awkward feeling where my hands go numb from fingertips until I barely feel my fingers. When I stop they slowly come back to normal, could this be caused by low blood pressure? Certainly undereating can lower it even more, but I've been doing this for a long time without any problems, only that I'm working out harder.
<bot>: I've been feeling stomach full, even when I eat little and my hands go numb while I exercise, has anyone else experienced this? Can anyone offer some input?