Comedown - Strange head pulsations after taking MDMA and mystery drug

[mandy_man]

4 days ago, SWIM went to a rave and consumed 1/4 gram of MDMA at around 12.00PM and another 1/4 at 2.00AM, making 1/2 in total.
SWIM has taken this MD before, it is from a trusted dealer, and previously it has given SWIM a great high. And sure enough for the next 3-4 hours SWIM felt on top of the world,
Then at around 4.30 -5.00AM SWIM stupidly consumed 1/3 of a gram of an unknown substance. SWIM only did this because he was already so high and feeling invincible, and will never do it again. SWIMs friend told him it was MDMA, yet it was bought for a surprisingly low price, SWIM later found out. Also, it was a weird brown colour, made up of very small crystals.
The 1/3 gram of this did little for SWIM, it didnt really bring him up and so he assumes it was rubbish.
Over the next couple of days SWIM felt really low, depressed and paranoid, which even a spliff couldnt calm. Yesterday SWIM felt so bad he could barely get up, and last night, SWIM got stupidly paranoid and scared.
But what is really bothering SWIM is that last evening he has been getting this strange pulsating in his brain, that has now, as he is writing this lasted almost 24 hours. Its like a tiny head rush, and comes about in varying speeds and strengths. It happens once every 10-15 seconds or so, but sometimes happens 4 times in a row. It seems to happen at random. WHen it happens SWIM feels a strange feeling of stretching in the back of his head, and a ringing sound in his ears comes. Last night it was so strong SWIM couldnt get to sleep because he woke up every time this pulsation kicked in.
SWIM is very worried about what this is, and would like to know if anyone knows either what this dodgy brown substance was (as SWIM is sure this caused it) and what if anyone else has experienced this or knows what it is
Thanks for reading, please tell SWIM anything you know it is starting to freak him out.