internal orgasm over powers clitoral orgasm

ive always gotten off by myself clitoraly. me and my boyfriend have sex alot especially lately trying to conceive. i have multiple orgasms when we have sex....the beds always wet. ive been super horny lately and when i try to clitorally orgasm i can't...its really really irritatating. i used to be able to touch myself and orgasm in less than a minute...these past few days ive tried till my arm hurt and my boyfriend even tried until his arm hurt...i felt like i was going to climax but it went away....i don't understand it...my clit hurts from trying for so long. i dont know why this is happening or if anyone knows of any other way to get off clitorally without hurting my jewlery box and still be able to have as much sex as i do. i was so desperate and horny last night i tried to use a ice cube. i have no sex toys so that isnt an option at the moment.