i havent had my period in over a month

i got my period on the last week of apr and it ended on the first of may i didnt get it in may and still havent got it, i keep getting pains in my stomach and i dont know what could be wrong yes im sexually active with my boyfriend but ive also done 2 hpt's both negitave so i dont know what is wrong with me, ive had irregular periods befor but never like this, can anyone help?

Are you under more stress than usual?  Over exercising?

my bad, double post

no thats what i dont get, im not doing anything different than i normally do so dont know what it could be

ectopic pregnancy can give false readings on HPT's.  Schedule a chat with the doc.

Are you symptomatic in any other way; tender breasts, moodiness, water weight puffiness, etc? It's still the first week of June, so you're only several days late, not a calamity yet. How's your diet and exercise? Are you trying to lose weight, gain or maintain? Call your doctor of course, but maybe you just need to wait a few extra days. The body is a mystery sometimes.

im over a month late, my diet is ok and i dont do much exercise, and havent being trying to lose or gain weight. im going to wait another while and if i dont get it i will be going to the doctor to see if he can tell me that it is, thank you all for your comments

im the same..havnt taken it since xmas tho:S

my diet and exercise is normal..bt my mum says it could be because tablets im on for acne..

maybe its just sumthin like tht?