Feeling left out

Lately my mother hasn't got any time for me anymore she's always making excuses like 'I'm busy, I'm settled for the night (at like 4pm) I'm going in the bath' and she's just making it awkward for me. I moved out when I was 17 because we didn't get along but now I'm 20 and now we get along better than ever but lately she's making up pathetic excuses of why she can't see me. I haven't seen her in three weeks and it's not like she's planning on seeing me anytime soon. And my boyfriend and I have been ttc for 3 months and she's making it really hard for me to tell her if we are pregnant