Constipation and other issues - need advice

nilu129

So wednesday afternoon my 7 week :LO had a watery poopy diaper but she BF just fine. Thursday morning she threw up everything she ate and had another watery poopy diaper. Now she spits up and makes sounds like she has BM in her throat and hasnt pooped at all, but has peed normally. She also has alittle bit of gas. Any suggestions as to how to alleviate the gas and get her to poop? Also does anyone have the spit up issue. I am just wondering if I should continue to breastfeed, go strictly to bottle feeding BM or switch to formula. I am very concerned.