Burning Pain After Tummy Tuck - Never Overweight, Had Surgery for Stretch Marks

TT to remove stretch marks. Quite a petite figure to begin with so while major surgery not much changes in body shape and size Great hospital experience, doctor one of best in country, lots of recs and creditation, etc nurses great, recovery great in hospital. was up and about 12 hours after surgery to go toilet, etc. by 24 hours back at home with lots of help. slep first couple days, now up to day 5. Have been out to lunch today which i walked slow but was fine in terms of sitting. seen doc yest given thumbs up and to see him in a week for stiches to come out drains taken out after 24 hours. I didn't realise that was quite early until researching when i got home. i barely had any blood in there when they were in there. they changed them once and it was 10% full when they did. i have been able to shower after 24 hours as wounds had protective bandaids over them. showers are wonderful, they relax all my muscles and i can stand straight and have absolutly no pain for the time i am in there. its magical.

it seems my post op seems different to other people and i dont know if its because of my small frame? feedback would be great

I have a couple questions. I am day 5 post op. I had great surgery,no issues I weighed about 110lb(50 kg) and only 156cm tall. I was never overweight just had surgery for stretch marks. Now my PS took my drain, which was small and I only had one on my hip, out after 24 hours as I was going home. Is this normal. everyone else seemed to keep theirs in for days. I went to see him yesterday to question this and he checked me and said i am recovering extremely well and all my wounds are fine, etc and didn't say anything about extra fluid (i seem more swollen than fluid build up) I have been allowed to shower from the day I got home which was 24 hours after surgery. my other issue is I am not that much pain when im walking around and even lying down, but the min i have to get up, I get this awful burning almost feels like ripping pain near my incision. I get worried im about to rip it open. it hurts so much, it has a warm feeling to it. as soon as i am up it goes away and im just left with the uncomfortable muscle usual pain that everyone seems to have. my incision looks fine, its a really thin line, by surgeon is one of the best in the country and does know what he is doing, so i am confident in that. I am just working my self up over i think he has taken my drains out too soon and why am i getting this pain when i try and get out of bed or a car, etc i also had a little child run into the back of my knees today accidently and it jolted me slightly but enough that i started crying of pain. i was ok after 4 mins or so but worried i may have done something