Thanks guys ^^. It's really heart warming how people feel for you when your kitty goes missing. I was afraid they'd think I was whining over nothing. But I seriously cried my eyes out while I carried her back to our apartment. I'm SO FRIGGIN' HAPPY she's back.
My boyfriend couldn't sleep last night, so apparently he'd been looking for Mila outside for hours when he woke me up at 5.30 am this morning, saying he'd seen her. Apparently she'd run away from him twice. He went to bed, knackered, and I took over his searching shift, so to speak. I walked around our apartment building, knowing she was close this time, until I saw a black cat sitting in front of a bush like a cop. I'm sure you'll know what I mean when I say that I just KNEW he/she was keeping another cat from fleeing from the bush. I walked towards the bush calling Mila's name and then suddenly heard a familiar "voice". I shooed the black cat away and out of the bush came Mila, meowing, skinny but looking healthy, and I grabbed her and didn't let go, bawling all the way home.
Mila is super cuddly, she always has been, and she's even more cuddly now. The only one unhappy with the situation is Nava, her sister. She doesn't like Mila anymore and she even hisses at my boyfriend and me if we try to pet her while we're still smelling like Mila. I've seen this happen before after Nava was outside for just a couple of hours. Back then it took them about 3 weeks to act normal to each other again. I'm sure it'll be alright again but it'll probably take a bit longer. After all, Mila was away from home for four nights and Nava seemed to enjoy being the only cat in the house, to be completely frank. Even though they're sisters and they play and sleep together all the time, she seemed more at ease and was much more cuddly when Mila was gone.
Mila wasn't neutered by the way. If she does deliver in about 9 weeks I'll be super happy, hehehehe, but if she doesn't the girls are both gonna get neutered asap.