HELP ME PLEASEEE

Hi im a new grower i live in the uk i only have one plant. its for my purposes not to be sold or anything i just need it to help me sleep at night as ive seen some scary things in my time and i suffer badly with it.

Now i had one plant a friend gave a me a seed and said try it.

i germinated it and popped into a pot. bam 4 days later and it popped up to say high. i kept it under a t5 6400k propagation light for a week feeding it every 3 days with bottled room temperature water. and miracle grow (for tomatoes, e.g edible food) once a week growing lovely. then i got a 250watt infrared bulb and hang it over it about 30/40 cm away from pot. and i left that on 22/2 off and growing perfect for a week.

then it sort of loosen it self down about 15/20 cm away from the plant i came back from food shopping and bam the plant is on its side. so ive propped it up with soil and put my t5 back over it.

I believe my baby is dieng is there anyway i can stop this from happening i really need this plant i cant afford to buy seeds this was my only chance.

please please can you help me all info is so appreciated thankyou