My HEAD HURTS!

Wow so today was eventful again.
Today was my first week having Mondays off due to my internship hours being finished I am now just maintaining my clients at work on Wednesdays so I was off today with nothing to do! SO I decided to go get mulch for my yard from the dump. On the way to the dump I suddenly got a stabbing feeling in my head that HURT like a bugger! I had never felt pain like that before! My mom was with me so she said i would be fine but If I felt it again to let her know. On our way to the dump for our second truckload it happened AGAIN. It lasted about 45 seconds to a minute then a lingering headache afterward. I started getting very concerned. On the third round to the dump (I had to go alone with Kyra cause My moms patient had a problem at home and she had to tend to that. It started happening every  10-15 mins!! after the 10th round of this sharp pain I thought it might be wise to go to the hospital. SO Kyra and I went to the ER. the doctors and nurses  checked me out. After a few tests the Doctor said they were something called "cluster headaches" I had never heard of them before but WOW they are painful! He said the best way to treat it would be to flood me with oxygen for 2 hours and they should be gone for a while.  He did just that and sure enough no more...He also told me to take some Tylenol and drink a caffeinated soda if it happens again. I'm skeptical about ANYTHING I'm taking pregnant so I think im gonna wait till my Dr says its ok !!  He also said i needed to check with my OB to make sure the baby was OK  which is good for me I want to make sure the soda and such is REALLY ok  I will call my Dr. in the morning to see what he wants me to do , meanwhile I'm TIRED!! GOOD NIGHT!!