Wife pregnant and she doesn't want to have sex

Brendon
My wife is 6 weeks pregnant and she doesn't want to have sex at all and it's really getting on my nerves we haven't had sex in 4 weeks .... and before she got pregnant we had sex at least 3 to 5 times a week plus I am only 21 and she is 27 and I love sex ... can someone help me .. what can I do to get her to want to have sex I've tried everything it seems like