Boyfriend Problems...

I was my SO about 4 days ago and another girl texted him saying that she's pregnant and doesn't know who the father is but that she slept with 2 people during the time of conception.. one being my boyfriend and the other being her SO. ever since he told me he's been acting weird considering I may be pregnant as well. but we haven't had sex in over a week I haven't seen him we barely talk I feel like we've lost our spark I've tried absolutely everything to get his mind off of it and to see me and he won't. so the past 2 days I've given him space and he sent me the strangest message saying he's done trying to see me but yet hasn't tried too once :( I'm so sad and torn any idea on what to do??