What Causes Nausea,nose Bleed,headache And Spasms In Abdomen?

Hi,
I came off the pill in January and had my last period about 7 weeks ago, I have the following symptoms
Nausea (also been throwing up loads)
Food aversions - coffee makes me throw up
watering mouth to the point I could fill a cup with drool in 10 mins!
backache
nosebleeds
stuffy nose
twinges like spasms in my abdomen
headaches
mood swings
Also I am tall but a size 6/8 (uk) but have got a swollen tummy and put on 4 lbs.
I have done 5 tests and all negative and its not like me to miss a period. Off to the doctors tonight who is going to do a blood tests and they said if its negative then they will send me for a scan.

I feel pregnant but am worried it might be side effects from coming off the pill.

(BTW I am 37)