Forcing with Pinkie π

[NightHorse666]

So, it's been a little harder for me to properly force as of late, I assume because of my growing depression.
However, last night I did start attempting to make a wonderland, although I didn't make too much progress due to me completely losing concentration after around 20 minutes.
I'm starting with Pinkie's bedroom, since she said that she would like that to be the start to the wonderland. I got some pretty weird feelings when I was concentrating/imagining it though. I got this falling feeling, and it seemed like the noise around me was amplified, and then when I snapped back, I was really lightheaded and dizzy, and it just seemed like the room I was in got brighter and blurred. Then once I finished the forcing session, I got a really bad headache.

Has anything similar happen to anyone else? I've read about people getting head pressures, but I've never heard of anyone getting a full on headache, much less any of that other stuff.